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A disposable screen-printed electrode modified with composite material of graphene aerogel, AuNPs, Nafion and PSA aptamer were fabricated for PSA detection. [Display omitted] • High-performance PSA detection based on SPE and electrochemical detection. • Introduce 3D graphene aerogel and AuNPs to highly boost detection sensitivity. • Highly sensitive and accurate detection of PSA with low LOD over 0.05 to 50 ng∙mL−1. Prostatic cancer threatens the lives and health of numerous male patients all over the world. As a single-chain glycoprotein, prostate specific antigen (PSA) can be used to perform prostate cancer screening. At present, there are still problems such as time-consuming and low sensitivity in hospital detection. At the same time, electrochemical immunosensor technology has received a lot of attention due to its benefits, including high sensitivity, good selectivity, low usage and cost, and so on. Electrocatalysts are typically used to build electrochemical immunosensors for signal amplification in the recent years to realize sensitive detection of cancer biomarkers such as PSA. In recent years, three-dimensional nanomaterials have been widely used in the study of electrocatalysts, but the study of the sensitivity for PSA detection is still very scarce. The present work reported the application of a 3D graphene aerogel(GA)/AuNPs/Nafion electrochemical platform for highly sensitive PSA quantification. The electrochemical immunosensor has been designed by immobilizing aptamers on the screen-printed electrode (SPE) surface modified by GA/AuNPs/Nafion. Scanning electron microscopy (SEM), Raman spectra, and electrochemical characterization demonstrated the successful combination of GA/AuNPs/Nafion/SPE. Based on electrochemical impedance spectroscopy (EIS), the proposed immunosensor has demonstrated excellent electrochemical performance, exhibiting sensitive and stable responses for electrochemical detection of PSA ranging from 0.05 to 50 ng∙mL−1 with a limit of detection (LOD) of 0.0306 ng∙mL−1. This study has great potential application in PSA detection and provides a valuable reference for point-of-care testing (POCT) of prostate cancer. [ABSTRACT FROM AUTHOR]

In this work, a room temperature liquid metal alloy (Galinstan) and tungsten diselenide (WSe 2) composite anode (LM x @WSe 2) were synthesized utilizing a one-step hydrothermal method. Through a comprehensive characterization process, including XRD, SEM, HRTEM, Raman spectroscopy, XPS, and BET, the structural and morphological properties of the synthesized composites were extensively explored. The liquid metal alloy was observed to combine effectively with WSe 2 via electrostatic adsorption, coordination, and additional bonding methods. Furthermore, it displayed high fluidity, deformability, and chemical stability. Consequently, the alloy promoted the repair of cracked surface areas in the electrode material and reduced internal oxidation-reduction reactions, leading to improved electrochemical performance during repeated lithium-ion insertion and extraction cycles. After 500 cycles at a current density of 1 A g−1, this composite electrode retained a capacity of 224.5 mAh g−1. Impressively, at a low temperature of − 10 °C, it maintained a capacity of 290 mAh g−1 after 50 cycles at a current density of 0.2 A g−1. Our research may open avenues for addressing mechanical difficulties experienced in flexible electronic devices and self-healing electronic circuits exposed to chemical reaction processes. • Liquid metal alloy (Galinstan) /WSe 2 composite anode was synthesized for LIBs. • Successful combination of liquid metal alloy and WSe 2 via various bonding methods. • High fluidity, deformability, and chemical stability observed in the alloy. • Electrochemical performance with superior capacity retention & low-temp. stability. [ABSTRACT FROM AUTHOR]

[Display omitted] • The controllable synthesis of AgNWs@WSe 2 via solvothermal method was achieved. • The as-fabricated AgNWs@WSe 2 promotes the entire electrochemical process. • Ion diffusion coefficient of WSe 2 powder and AgNWs@WSe 2 were obtained using GITT. • Finite element simulations reveals rapid electron/ion diffusion kinetics. A nanocomposite (AgNWs@WSe 2) consisting of tungsten diselenide (WSe 2) nanosheets decorated with silver nanowires (AgNWs) was synthesized by a simple solvothermal method. In order to investigate its lithium-ion storage performance, AgNWs act as an effective backbone for the in-situ growth of WSe 2 on its surface. Compared with pure tungsten diselenide electrode material, this composite material has more excellent multiplicative performance and long cycle stability(348.7 mAh g-1 at 1 A g-1 after 500 cycles). Additional results combined with COMSOL simulations further demonstrate the superior lithium performance of the composite electrode, mainly due to the typical one-dimensional AgNWs provide direct channels for electron transfer, slowing down the volume expansion during lithium ion embedding/detachment, and inhibit mechanical degradation, thus enabling longer cycling life. [ABSTRACT FROM AUTHOR]