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136 results on '"Pérez, Emilio M."'

1. Rapid and simple viral protein detection by functionalized 2D MoS2/graphene electrochemiluminescence aptasensor

Author

Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Comunidad de Madrid, Ministerio de Ciencia e Innovación (España), European Commission, Ministerio de Economía y Competitividad (España), López-Diego, David [0009-0003-0396-1077], Luna, Mónica [0000-0002-7104-0726], Gutiérrez-Gálvez, Laura, El Hajioui-El Ghalbzouri, Hanaa, Enebral-Romero, Estefanía, Garrido, Marina, Naranjo, Alicia, López-Diego, David, Luna, Mónica, Pérez, Emilio M., García-Mendiola, Tania, Lorenzo, Encarnación, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Comunidad de Madrid, Ministerio de Ciencia e Innovación (España), European Commission, Ministerio de Economía y Competitividad (España), López-Diego, David [0009-0003-0396-1077], Luna, Mónica [0000-0002-7104-0726], Gutiérrez-Gálvez, Laura, El Hajioui-El Ghalbzouri, Hanaa, Enebral-Romero, Estefanía, Garrido, Marina, Naranjo, Alicia, López-Diego, David, Luna, Mónica, Pérez, Emilio M., García-Mendiola, Tania, and Lorenzo, Encarnación

Abstract

In this work we present the development of an electrochemiluminescence aptasensor based on electrografting molybdenum disulphide nanosheets functionalized with diazonium salt (MoS2-N2+) upon screen-printed electrodes of graphene (SPEs GPH) for viral proteins detection. In brief, this aptasensor consists of SPEs GPH electrografted with MoS2-N2+ and modified with a thiolated aptamer, which can specifically recognize the target protein analyte. In this case, we have used SARS-CoV-2 spike protein as model protein. Electrochemiluminescence detection was performed by using the [Ru(bpy)3]2+/TPRA (tripropylamine) system, which allows the specific detection of the SARS-CoV-2 spike protein easily and rapidly with a detection limit of 9.74 fg/mL and a linear range from 32.5 fg/mL to 50.0 pg/mL. Moreover, the applicability of the aptasensor has been confirmed by the detection of the protein directly in human saliva samples. Comparing our device with a traditional saliva antigen test, our aptasensor can detect the spike protein even when the saliva antigen test gives a negative result.

Published
2024

2. Hydrogen-bonded synthetic molecular machines

Author

Pérez, Emilio M.

Subjects
547.5
Abstract

This thesis reports on: 1) the development of two new methods to provoke the translation of the macrocycle along the thread (“shuttling”) in hydrogen bonded, fumaramide-based [2]rotaxanes and 2) the utilization of that movement to provoke a potentially useful response. The fumaramide template is perfectly preorganised to form four intercomponent hydrogen bonds with a benzylic amide macrocycle, affording [2]rotaxanes in “world record” yields. This preorganisation can be disrupted by photo-isomerisation (254 nm) of the E double bond to its Z counterpart. The newly formed maleamide template shows little affinity for the macrocycle. This has previously been exploited to synthesise a light and heat switchable molecular shuttles. A unique tristable molecular shuttle in which the macrocycle can be located in three different “stations” by means of thermal and photochemical stimuli is described in Chapter Two. In Chapter Three an alternative mechanism of shuttling for fumaramide-based molecular shuttles is reported. The reversibility of Diels-Alder chemistry is exploited to synthesise a chemically driven molecular shuttle. A chiral two-station [2]rotaxane in which translational motion of the macrocycle along the thread results in a profound change in its optical properties (CD spectrum) is described in Chapter Four. Finally, a light-switchable optically-addressable molecular shuttle is discussed. A [2]rotaxane with a thread containing a fluorophore and a macrocycle functionalised to quench its fluorescence was synthesised. Shuttling of the macrocycle along the thread switched the fluorescence “on” and “off”.

Published
2004

3. Data - Automated Statistical analysis of Raman spectra of nanomaterials

Author

Martín Sabanés, N., Eaton, M. D., Moreno-Da Silva, S., Naranjo, A., Pérez, Emilio M., Martín Sabanés, N., Eaton, M. D., Moreno-Da Silva, S., Naranjo, A., and Pérez, Emilio M.

Abstract

A computational tool to automatically analyze the Raman spectral features of nanomaterials. Codes and experimental data.

Published
2023

4. Direct Magnetic Evidence, Functionalization, and Low-Temperature Magneto-Electron Transport in Liquid-Phase Exfoliated FePS3

Author

Martín-Pérez, Lucas, Medina Rivero S., Vázquez Sulleiro M., Naranjo A., Gómez I.J., Ruíz-González M.L., Castellanos-Gomez A., Garcia-Hernandez M., Pérez, Emilio M., Burzurí E., Martín-Pérez, Lucas, Medina Rivero S., Vázquez Sulleiro M., Naranjo A., Gómez I.J., Ruíz-González M.L., Castellanos-Gomez A., Garcia-Hernandez M., Pérez, Emilio M., and Burzurí E.

Published
2023

5. Microwave-Driven Exfoliation of Bulk 2H-MoS2 after Acetonitrile Prewetting Produces Large-Area Ultrathin Flakes with Exceptionally High Yield

Author

Quirós-Ovies, Ramiro, Laborda, María, Martín Sabanés, Natalia, Martín-Pérez, Lucía, Moreno-Da Silva, Sara, Burzurí E., Sebastian, Víctor, Pérez, Emilio M., Santamaría, Jesús, Quirós-Ovies, Ramiro, Laborda, María, Martín Sabanés, Natalia, Martín-Pérez, Lucía, Moreno-Da Silva, Sara, Burzurí E., Sebastian, Víctor, Pérez, Emilio M., and Santamaría, Jesús

Published
2023

7. Pathogen sensing device based on 2D MoS2/graphene heterostructure.

Author

Enebral-Romero E., Gutiérrez-Gálvez L., Del Caño R., Sulleiro M.V., Naranjo A., Gómez I.J., Pariente F., Pérez, Emilio M., García-Mendiola T., Lorenzo E., Enebral-Romero E., Gutiérrez-Gálvez L., Del Caño R., Sulleiro M.V., Naranjo A., Gómez I.J., Pariente F., Pérez, Emilio M., García-Mendiola T., and Lorenzo E.

Published
2023

9. Interlocking Matrix and Filler for Enhanced Individualization and Reinforcement in Polymer-Single-Walled Carbon Nanotube Composites

Author

Villalva J., Rapakousiou A., Monclús M.A., Fernández Blázquez J.P., de la Vega J., Naranjo A., Vera-Hidalgo M., Ruiz-González M.L., Pedersen H., Pérez, Emilio M., Villalva J., Rapakousiou A., Monclús M.A., Fernández Blázquez J.P., de la Vega J., Naranjo A., Vera-Hidalgo M., Ruiz-González M.L., Pedersen H., and Pérez, Emilio M.

Published
2023

11. Supplementary Material MoS2-Carbon Nanodots as New Electrochemiluminescence Platform for Breast Cancer Biomarker Detection

Author

Gutiérrez-Gálvez, Laura, Vázquez Sulleiro, Manuel, Gutiérrez-Sánchez, Cristina, García-Nieto, Daniel, Luna, Mónica, Pérez, Emilio M., García-Mendiola, Tania, Lorenzo, Encarnación, Gutiérrez-Gálvez, Laura, Vázquez Sulleiro, Manuel, Gutiérrez-Sánchez, Cristina, García-Nieto, Daniel, Luna, Mónica, Pérez, Emilio M., García-Mendiola, Tania, and Lorenzo, Encarnación

Published
2023

12. Multiplex Portable Biosensor for Bacteria Detection

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Ciencia e Innovación (España), Comunidad de Madrid, Ministerio de Economía y Competitividad (España), European Commission, Kaci, Karim, Enebral-Romero, Estefanía, Martínez-Periñán, Emiliano, Garrido, Marina, Pérez, Emilio M., López-Diego, David, Luna, Mónica, González de Rivera, Guillermo, García-Mendiola, Tania, Lorenzo, Encarnación, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Ciencia e Innovación (España), Comunidad de Madrid, Ministerio de Economía y Competitividad (España), European Commission, Kaci, Karim, Enebral-Romero, Estefanía, Martínez-Periñán, Emiliano, Garrido, Marina, Pérez, Emilio M., López-Diego, David, Luna, Mónica, González de Rivera, Guillermo, García-Mendiola, Tania, and Lorenzo, Encarnación

Abstract

An advanced, cost-effective, and portable DNA biosensor capable of detecting multiple bacteria simultaneously has been developed. The biosensor comprises a fast and inexpensive potentiostat that controls the applied potential to a screen-printed electrochemical array platform functionalized with MoS2 flakes and bacterial DNA probes. The current response obtained by à la carte thionine functionalized carbon nanodots (Ty-CDs) is monitored as an electrochemical indicator of the hybridization event. The design of the potentiostat prioritizes achieving an optimal signal-to-noise ratio and incorporates a user-friendly interface compatible with various devices, including computers, mobile phones, and tablets. The device is compact, lightweight, and manufactured at a low cost. The key components of the potentiostat include a data acquisition board capable of analyzing multiple samples simultaneously and a controller board. The results of this study confirm the ability of the multiplex portable biosensor to successfully detect specific bacterial DNA sequences, demonstrating its reliability and superior performance compared with a traditional, more complex, and laboratory-oriented potentiostat.

Published
2023

13. Supporting information: Microwave-Driven Exfoliation of Bulk 2H-MoS2 after Acetonitrile Prewetting Produces Large-Area Ultrathin Flakes with Exceptionally High Yield

Author

Quirós‐Ovies, Ramiro, Laborda, María, Martín Sabanés, Natalia, Martín-Pérez, Lucía, Moreno-Da Silva, Sara, Burzurí, Enrique, Sebastián, Víctor, Pérez, Emilio M., Santamaría, Jesús, Quirós‐Ovies, Ramiro, Laborda, María, Martín Sabanés, Natalia, Martín-Pérez, Lucía, Moreno-Da Silva, Sara, Burzurí, Enrique, Sebastián, Víctor, Pérez, Emilio M., and Santamaría, Jesús

Abstract

Screening of exfoliation conditions (dispersion solvent, prewetting solvent, microwave power, microwave irradiation time, MoS2–NMP ratio, and % yield); UV–vis analyses, optical and electronic microscopy analyses; thermogravimetric analysis of bulk and exfoliated MoS2, X-ray photoelectron spectroscopy analysis, electron transport measurements.

Published
2023

14. Bridging spin Qbits to superconducting circuits through carbon nanotubes

Author

Ory, Marina C. de, Moreno-Da Silva, Sara, Martín-Pérez, Lucía, Pérez, Emilio M., Granados, Daniel, Luis, Fernando, Burzurí, Enrique, Gómez, Alicia, Ory, Marina C. de, Moreno-Da Silva, Sara, Martín-Pérez, Lucía, Pérez, Emilio M., Granados, Daniel, Luis, Fernando, Burzurí, Enrique, and Gómez, Alicia

Abstract

Hybrid systems based on superconducting planar resonators strongly coupled to magnetic molecules are promising candidates for future large-scale quantum processors. Superconducting microwave resonators allow the strong confinement of the electromagnetic fields mode volume, which is crucial for reaching a strong and coherent coupling with the spin qubits. However, achieving control over a few or single spins remains challenging. In this sense, two main issues need to be overcome. First, the cavity field effective volume needs to be further concentrated to maximize the addressability of a single spin in a controlled way. Second, as the microwave field is localized in a nanoscopic region, developing a method to deliver the magnetic sample with sufficient spatial accuracy is crucial. As a first approach, I. Gimeno et al. showed that reducing the width of a superconducting transmission line locally leads to an enhancement of the microwave magnetic field and, therefore, of the achieved coupling. Utilizing dip pen nanolithography, they can place nanodeposits in a controlled way, reducing the number of coupled spins by several orders of magnitude. However, new approaches must be developed to achieve strong coupling to a single spin. We propose to downscale and reach the single-spin sensitivity limit by replacing the constriction of the superconducting resonator with a carbon nanotube (CNT). This approach presents two significant advantages: first, it concentrates further the microwave magnetic volume, increasing the coupling rate to a single spin; second, as CNT can be directly functionalized with molecular species, it allows addressing a single magnetic molecule in a localized position. Preliminary results of a hybrid superconducting/CNT resonator are presented, where the controlled positioning of the carbon nanotube on the nanometer scale has been achieved by dielectrophoresis. Moreover, optimized superconducting lumped element resonators (LERs) have been developed and co

Published
2023

15. MoS2-Carbon nanodots as a new electrochemiluminescence platform for breast cancer biomarker detection

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Comunidad de Madrid, Consejo Superior de Investigaciones Científicas (España), European Commission, Ministerio de Ciencia e Innovación (España), Gutiérrez-Gálvez, Laura, Vázquez Sulleiro, Manuel, Gutiérrez-Sánchez, Cristina, García-Nieto, Daniel, Luna, Mónica, Pérez, Emilio M., García-Mendiola, Tania, Lorenzo, Encarnación, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Comunidad de Madrid, Consejo Superior de Investigaciones Científicas (España), European Commission, Ministerio de Ciencia e Innovación (España), Gutiérrez-Gálvez, Laura, Vázquez Sulleiro, Manuel, Gutiérrez-Sánchez, Cristina, García-Nieto, Daniel, Luna, Mónica, Pérez, Emilio M., García-Mendiola, Tania, and Lorenzo, Encarnación

Abstract

In this work, we present the combination of two different types of nanomaterials, 2D molybdenum disulfide nanosheets (MoS2-NS) and zero-dimensional carbon nanodots (CDs), for the development of a new electrochemiluminescence (ECL) platform for the early detection and quantification of the biomarker human epidermal growth factor receptor 2 (HER2), whose overexpression is associated with breast cancer. MoS2-NS are used as an immobilization platform for the thiolated aptamer, which can recognize the HER2 epitope peptide with high affinity, and CDs act as coreactants of the anodic oxidation of the luminophore [Ru(bpy)3]2+. The HER2 biomarker is detected by changes in the ECL signal of the [Ru(bpy)3]2+/CD system, with a low detection limit of 1.84 fg/mL and a wide linear range. The proposed method has been successfully applied to detect the HER2 biomarker in human serum samples.

Published
2023

18. Single-Walled Carbon Nanotubes Encapsulated within Metallacycles

Author

López-Moreno A., Ibáñez S., Moreno-Da Silva S., Ruiz-González L., Sabanés N.M., Peris E., Pérez, Emilio M., López-Moreno A., Ibáñez S., Moreno-Da Silva S., Ruiz-González L., Sabanés N.M., Peris E., and Pérez, Emilio M.

Published
2022

20. Design and Manipulation of a Minimalistic Hydrocarbon Nanocar on Au(111)

Author

Barragán A., Nicolás-García T., Lauwaet K., Sánchez-Grande A., Urgel J.I., Björk J., Pérez, Emilio M., Écija, David, Barragán A., Nicolás-García T., Lauwaet K., Sánchez-Grande A., Urgel J.I., Björk J., Pérez, Emilio M., and Écija, David

Published
2022

21. Fabrication of devices featuring covalently linked MoS2–graphene heterostructures

Author

Pérez, Emilio M., Vázquez Sulleiro Manuel, Develioglu Aysegul, Quirós Ovies Ramiro, Martín Pérez Lucía, Martín Sabanés Natalia, González Juárez María Lourdes, Gómez Jennifer, Vera Hidalgo Mariano, Sebastián Victor, Santamaría Jesús, Burzurí E., Pérez, Emilio M., Vázquez Sulleiro Manuel, Develioglu Aysegul, Quirós Ovies Ramiro, Martín Pérez Lucía, Martín Sabanés Natalia, González Juárez María Lourdes, Gómez Jennifer, Vera Hidalgo Mariano, Sebastián Victor, Santamaría Jesús, and Burzurí E.

Published
2022

23. Fabrication of devices featuring covalently linked MoS2–graphene heterostructures

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), European Research Council, European Commission, Ministry of Education, Youth and Sports (Czech Republic), Comunidad de Madrid, Ministerio de Ciencia e Innovación (España), Vázquez Sulleiro, Manuel, Develioglu, Aysegul, Quirós‐Ovies, Ramiro, Martín-Pérez, Lucía, Martín Sabanés, Natalia, Gonzalez-Juarez, Maria Lourdes, Gómez, I. Jénnifer, Vera‐Hidalgo, Mariano, Sebastián, Víctor, Santamaría, Jesús, Burzurí, Enrique, Pérez, Emilio M., Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), European Research Council, European Commission, Ministry of Education, Youth and Sports (Czech Republic), Comunidad de Madrid, Ministerio de Ciencia e Innovación (España), Vázquez Sulleiro, Manuel, Develioglu, Aysegul, Quirós‐Ovies, Ramiro, Martín-Pérez, Lucía, Martín Sabanés, Natalia, Gonzalez-Juarez, Maria Lourdes, Gómez, I. Jénnifer, Vera‐Hidalgo, Mariano, Sebastián, Víctor, Santamaría, Jesús, Burzurí, Enrique, and Pérez, Emilio M.

Abstract

The most widespread method for the synthesis of 2D–2D heterostructures is the direct growth of one material on top of the other. Alternatively, flakes of different materials can be manually stacked on top of each other. Both methods typically involve stacking 2D layers through van der Waals forces—such that these materials are often referred to as van der Waals heterostructures—and are stacked one crystal or one device at a time. Here we describe the covalent grafting of 2H-MoS2 flakes onto graphene monolayers embedded in field-effect transistors. A bifunctional molecule featuring a maleimide and a diazonium functional group was used, known to connect to sulfide- and carbon-based materials, respectively. MoS2 flakes were exfoliated, functionalized by reaction with the maleimide moieties and then anchored to graphene by the diazonium groups. This approach enabled the simultaneous functionalization of several devices. The electronic properties of the resulting heterostructure are shown to be dominated by the MoS2–graphene interface.

Published
2022

24. 2D-2D covalent heterostructures: High-throughput on-device connection of MoS2 and graphene

Author

Quirós‐Ovies, Ramiro, Vázquez Sulleiro, Manuel, Develioglu, Aysegul, Martín Sabanés, Natalia, Gómez, I. Jénnifer, Vera‐Hidalgo, Mariano, Sebastián, Víctor, Santamaría, Jesús, Burzurí, Enrique, Pérez, Emilio M., Quirós‐Ovies, Ramiro, Vázquez Sulleiro, Manuel, Develioglu, Aysegul, Martín Sabanés, Natalia, Gómez, I. Jénnifer, Vera‐Hidalgo, Mariano, Sebastián, Víctor, Santamaría, Jesús, Burzurí, Enrique, and Pérez, Emilio M.

Abstract

The most widespread method for the synthesis of 2D-2D heterostructures is the direct growth of one material on top of the other. Alternatively, one can manually stack flakes of different materials. Both methods are limited to one crystal/device at a time and involve interfacing the 2D materials through van der Waals forces, to the point that all these materials are known as van der Waals heterostructures. Synthetic chemistry is the paradigm of atomic-scale control, yet its toolbox remains unexplored for the construction of 2D-2D heterostructures. Here, we describe how to covalently connect 2H-MoS2 flakes to several single-layer graphene field-effect transistors simultaneously, and show that the final electronic properties of the MoS2-graphene heterostructure are dominated by the molecular interface. We use a bifunctional molecule with two chemically orthogonal anchor points, selective for sulfides and carbon-based materials: On one hand, we exploit the chemistry of maleimide described by our group to functionalize sulfide-based materials under mild conditions. On the other hand, we use a diazonium salt, which is the most common method for the covalent modification graphene. The solvents play a key role to activate a specific part of the molecule for the covalent anchoring. In order to measure the electrical properties of the heterostructure, we have fabricated a number of f-MoS2@graphene field effect transistors (FET) on Si/SiO2 substrates. The electronic properties of the functionalized devices are dominated by the chemical interface, resulting in p-doped devices in which the charge mobility is conserved after reaction, and the degree of doping can be controlled by increasing the degree of functionalization. The results described here show the power of the chemical approach to build functional 2D-2D heterostructures beyond van der Waals. Figure 1: Experimental procedure for the production of MoS2@Graphene covalent heterostructures.

Published
2022

25. Magnetic mechanically-interlocked porphyrin-carbon nanotubes

Author

Moreno-Da Silva, Sara, Martínez, Jesús I., Develioglu, Aysegul, Nieto-Ortega, Belén, Juan-Fernández, Leire de, Ruiz-Gonzalez, Luisa, Picón, Antonio, Oberli, Soléne, Alonso, Pablo J., Moonshiram, Dooshaye, Pérez, Emilio M., Burzurí, Enrique, Moreno-Da Silva, Sara, Martínez, Jesús I., Develioglu, Aysegul, Nieto-Ortega, Belén, Juan-Fernández, Leire de, Ruiz-Gonzalez, Luisa, Picón, Antonio, Oberli, Soléne, Alonso, Pablo J., Moonshiram, Dooshaye, Pérez, Emilio M., and Burzurí, Enrique

Abstract

Magnetic molecules have been proposed as versatile building blocks for quantum computing and molecular spintronics devices. The molecular spin can be used to encode quantum information in qubits or even perform logic operations as quantum gates with unmatched reproducibility and scalability. In spintronics, that same molecular spin can be used to generate spin currents in molecular based spin filters, spin switches or spin valves in carbon-nanotube/molecule hybrids, among other applications. Several strategies have been followed to couple the magnetic molecules to carbon nanotubes: direct physisorption of the molecules, covalent bonding or encapsulation of the magnetic molecules. We have developed the synthesis of mechanically interlocked rotaxane-like SWCNT derivatives (MINTs), in which the ring-closing metathesis of a U-shape molecule around SWCNTs is templated. In particular, we fabricated Cu2+ and Co2+ metalloporphyrin dimer rings mechanically interlocked around carbon nanotubes to form magnetic MINTs (mMINT). Magnetic porphyrins are selected due to their recently proved suitability as qubits, even preserving their magnetic properties and quantum coherence on surfaces. The mechanical bond places the porphyrin magnetic cores in close contact with the SWCNT without disturbing the molecular spin nor the carbon nanotube structure. The magnetic properties of the metallic dimers are preserved upon formation the mechanically interlocked hybrid.

Published
2022

26. Spin-state-dependent electrical conductivity in single-walled carbon nanotubes encapsulating spin-crossover molecules

Author

Universidad de Sevilla. Departamento de Química Física, Marie Skłodowska-Curie Actions (MSCA), Programa de Atracción del Talento Investigador. Comunidad de Madrid, Ministerio de Economia, Industria y Competitividad (MINECO). España, Consejo Europeo de Investigación (ERC), Comunidad Autónoma de Madrid, NANOMAGCOST, Villalva, Julia, Develioglu, Aysegul, Montenegro Pohlhammer, Nicolás, Sánchez de Armas, María Rocío, Gamonal, Arturo, Rial, Eduardo, García Hernández, Mar, Ruiz González, Luisa, Sánchez Costa, José, Jiménez Calzado, María del Carmen, Pérez, Emilio M., Burzuri, Enrique, Universidad de Sevilla. Departamento de Química Física, Marie Skłodowska-Curie Actions (MSCA), Programa de Atracción del Talento Investigador. Comunidad de Madrid, Ministerio de Economia, Industria y Competitividad (MINECO). España, Consejo Europeo de Investigación (ERC), Comunidad Autónoma de Madrid, NANOMAGCOST, Villalva, Julia, Develioglu, Aysegul, Montenegro Pohlhammer, Nicolás, Sánchez de Armas, María Rocío, Gamonal, Arturo, Rial, Eduardo, García Hernández, Mar, Ruiz González, Luisa, Sánchez Costa, José, Jiménez Calzado, María del Carmen, Pérez, Emilio M., and Burzuri, Enrique

Abstract

Spin crossover (SCO) molecules are promising nanoscale magnetic switches due to their ability to modify their spin state under several stimuli. However, SCO systems face several bottlenecks when downscaling into nanoscale spintronic devices: their instability at the nanoscale, their insulating character and the lack of control when positioning nanocrystals in nanodevices. Here we show the encapsulation of robust Fe-based SCO molecules within the 1D cavities of single-walled carbon nanotubes (SWCNT). We find that the SCO mechanism endures encapsulation and positioning of individual heterostructures in nanoscale transistors. The SCO switch in the guest molecules triggers a large conductance bistability through the host SWCNT. Moreover, the SCO transition shifts to higher temperatures and displays hysteresis cycles, and thus memory effect, not present in crystalline samples. Our results demonstrate how encapsulation in SWCNTs provides the backbone for the readout and positioning of SCO molecules into nanodevices, and can also help to tune their magnetic properties at the nanoscale.

Published
2021

27. Spin-state-dependent electrical conductivity in single-walled carbon nanotubes encapsulating spin-crossover molecules

Author

Villalva J., Develioglu A., Montenegro-Pohlhammer N., Sánchez-de-Armas R., Gamonal A., Rial E., García-Hernández M., Ruiz-González L., Sánchez Costa, Jose, Calzado C.J., Pérez, Emilio M., Burzurí E., Villalva J., Develioglu A., Montenegro-Pohlhammer N., Sánchez-de-Armas R., Gamonal A., Rial E., García-Hernández M., Ruiz-González L., Sánchez Costa, Jose, Calzado C.J., Pérez, Emilio M., and Burzurí E.

Published
2021

28. A MoS2 platform and thionine-carbon nanodots for sensitive and selective detection of pathogens

Author

Martínez-Periñán E., García-Mendiola T., Enebral-Romero E., del Caño R., Vera-Hidalgo M., Vázquez Sulleiro M., Navío C., Pariente F., Pérez, Emilio M., Lorenzo E., Martínez-Periñán E., García-Mendiola T., Enebral-Romero E., del Caño R., Vera-Hidalgo M., Vázquez Sulleiro M., Navío C., Pariente F., Pérez, Emilio M., and Lorenzo E.

Published
2021

30. Covalent modification of franckeite with maleimides: Connecting molecules and van der Waals heterostructures

Author

Villalva J., Moreno-Da Silva S., Villa P., Ruiz-González L., Navío C., Garcia-Orrit S., Vega-Mayoral V., Cabanillas González, Juan, Castellanos-Gomez A., Giovanelli E., Pérez, Emilio M., Villalva J., Moreno-Da Silva S., Villa P., Ruiz-González L., Navío C., Garcia-Orrit S., Vega-Mayoral V., Cabanillas González, Juan, Castellanos-Gomez A., Giovanelli E., and Pérez, Emilio M.

Published
2021

32. Magnetic, Mechanically Interlocked Porphyrin-Carbon Nanotubes for Quantum Computation and Spintronics

Author

Moreno-Da Silva S., Martínez J.I., Develioglu A., Nieto-Ortega B., De Juan-Fernández L., Ruiz-González L., Picón A., Oberli S., Alonso P.J., Moonshiram D., Pérez, Emilio M., Burzurí E., Moreno-Da Silva S., Martínez J.I., Develioglu A., Nieto-Ortega B., De Juan-Fernández L., Ruiz-González L., Picón A., Oberli S., Alonso P.J., Moonshiram D., Pérez, Emilio M., and Burzurí E.

Published
2021

35. Covalent Cross-Linking of 2H-MoS2 Nanosheets

Author

Vázquez Sulleiro M., Quirós-Ovies R., Vera-Hidalgo M., Gómez I.J., Sebastián V., Santamaría J., Pérez, Emilio M., Vázquez Sulleiro M., Quirós-Ovies R., Vera-Hidalgo M., Gómez I.J., Sebastián V., Santamaría J., and Pérez, Emilio M.

Published
2020

36. Hydrogen-bonded host–guest systems are stable in ionic liquids

Author

Naranjo T., Álvarez-Asencio R., Pedraz P., Nieto-Ortega B., Silva S.M.-D., Burzurí E., Rutland M.W., Pérez, Emilio M., Naranjo T., Álvarez-Asencio R., Pedraz P., Nieto-Ortega B., Silva S.M.-D., Burzurí E., Rutland M.W., and Pérez, Emilio M.

Published
2020

37. Stronger aramids through molecular design and nanoprocessing

Author

Rapakousiou A., López-Moreno A., Nieto-Ortega B., Bernal M.M., Monclús M.A., Casado S., Navío C., González L.R., Fernández-Blázquez J.P., Vilatela J.J., Pérez, Emilio M., Rapakousiou A., López-Moreno A., Nieto-Ortega B., Bernal M.M., Monclús M.A., Casado S., Navío C., González L.R., Fernández-Blázquez J.P., Vilatela J.J., and Pérez, Emilio M.

Published
2020

40. Controlled covalent functionalization of 2 H‐MoS2 with molecular or polymeric adlayers

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), European Research Council, European Commission, Brno University of Technology, Comunidad de Madrid, Quirós‐Ovies, Ramiro, Vázquez Sulleiro, Manuel, Vera‐Hidalgo, Mariano, Prieto, Javier, Gómez, I. Jénnifer, Sebastián, Víctor, Ricote, J., Pérez, Emilio M., Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), European Research Council, European Commission, Brno University of Technology, Comunidad de Madrid, Quirós‐Ovies, Ramiro, Vázquez Sulleiro, Manuel, Vera‐Hidalgo, Mariano, Prieto, Javier, Gómez, I. Jénnifer, Sebastián, Víctor, Ricote, J., and Pérez, Emilio M.

Abstract

Most air‐stable 2D materials are relatively inert, which makes their chemical modification difficult. In particular, in the case of MoS2, the semiconducting 2 H‐MoS2 is much less reactive than its metallic counterpart, 1T‐MoS2. As a consequence, there are hardly any reliable methods for the covalent modification of 2 H‐MoS2. An ideal method for the chemical functionalization of such materials should be both mild, not requiring the introduction of a large number of defects, and versatile, allowing for the decoration with as many different functional groups as possible. Herein, a comprehensive study on the covalent functionalization of 2 H‐MoS2 with maleimides is presented. The use of a base (Et3N) leads to the in situ formation of a succinimide polymer layer, covalently connected to MoS2. In contrast, in the absence of base, functionalization stops at the molecular level. Moreover, the functionalization protocol is mild (occurs at room temperature), fast (nearly complete in 1 h), and very flexible (11 different solvents and 10 different maleimides tested). In practical terms, the procedures described here allow for the chemist to manipulate 2 H‐MoS2 in a very flexible way, decorating it with polymers or molecules, and with a wide range of functional groups for subsequent modification. Conceptually, the spurious formation of an organic polymer might be general to other methods of functionalization of 2D materials, where a large excess of molecular reagents is typically used.

Published
2020

48. Mechanically interlocked deriviatives of single walled carbon nanotubes

Author

Pérez, Emilio M., Juan Garrudo, Alberto de, Pérez, Emilio M., and Juan Garrudo, Alberto de

Abstract

Los nanotubos de carbono de pared simple fueron descubiertos por Ijima1 y Bethune2 en 1993. Desde entonces han despertado un gran interés debido a sus extraordinarias propiedades mecánicas,3,4,5 electrónicas6,7,8 y ópticas. 9 Actualmente, numerosas investigaciones se han centrado en la síntesis10,11,12 y purificación13,14,15 de nanotubos de carbono, así como en su funcionalización química mediante métodos covalentes16 y no covalentes.17 El objetivo final de la modificación química es tanto purificar18 las complicadas mezclas de nanotubos de carbono como modular sus propiedades. Por un lado, la modificación covalente de nanotubos de carbono genera productos con alta estabilidad cinética, pero se modifica la red de carbonos sp2 alterando las propiedades del material de partida. Por otro lado, la modificación no covalente de nanotubos de carbono permite mantener intactas la estructura y propiedades del material de partida, pero los productos obtenidos suelen presentar baja estabilidad cinética..., Single walled carbon nanotubes (SWNTs) were discovered by Ijima1 and Bethune 2 in 1993. They have been attracted a great deal of attention from the scientific community due to their extraordinary mechanical, 3,4,5 electrical6,7,8 and optical properties.9 Currently, many research efforts are focused not only on the synthesis10,11,12 of carbon nanotubes and their purification through physical methods,13,14,15 but also on the chemical functionalization of SWNTs through covalent16 or noncovalent methods17. The final objective of chemical modification is either to purify18 the complex mixture of SWNTs or to modulate their interesting properties. The covalent modification of SWNTs leads to products with high kinetic stability, but it disrupts the sp2 carbon network, so the native properties of the pristine material change. The noncovalent modification of SWNTs respects the structure and the interesting properties of pristine SWNTs, but the products usually show low kinetic stability...

Published
2018

49. Graphene catalyzes the reversible formation of a C–C bond between two molecules

Author

Navarro J.J., Pisarra M., Nieto-Ortega B., Villalva J., Ayani C.G., Díaz C., Calleja, Fabián, Miranda, Rodolfo, Martín, Fernando, Pérez, Emilio M., Vázquez de Parga, Amadeo L., Navarro J.J., Pisarra M., Nieto-Ortega B., Villalva J., Ayani C.G., Díaz C., Calleja, Fabián, Miranda, Rodolfo, Martín, Fernando, Pérez, Emilio M., and Vázquez de Parga, Amadeo L.

Published
2018

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