Search

A number of different research methodologies have been developed to increase the conductivity and mechanical properties of stretchable or flexible conductors. One of the promising techniques recommended for applying metallic nanoparticles (NPs) to PDMS (polydimethylsiloxane) substrate is to develop a thin-film that gives possible conductivity and good mechanical strain. This article discusses the preparation of silver nanoparticles using the chemical reduction method with silver nitrate as the precursor, and uses glucose as a reducing agent. In addition, polyvinyl pyrrolidone (PVP) is used to prevent the nanoparticles' oxidation and agglomeration once they have been synthesized successfully. Moreover, we utilize the power of diethylamine to accelerate the evolution of nanoparticles, and deionized water is used to prevent any possible contamination. The prepared Ag-NPs are then deposited on the solidified PDMS substrate through sintering. A multimeter is used to measure the electrical resistance. Ag-NPs are confirmed by UV-Vis at a 400-nm peak. Furthermore, we discuss the surface morphologies, particle sizes and thicknesses of the film and substrate when studied using different microscopy techniques. The prepared stretchable conductor is found to be suitable to use in biosensing and electronic devices. [ABSTRACT FROM AUTHOR]

AbstractThis study presents a novel approach for the simultaneous identification and quantification of extractable chlorinated organic carriers (COCs) from diverse materials, including textiles, foam and leather. COCs, valued for chemical synthesis, dye transfer and solvents for dye formulations. In this work, dichloromethane under ultrasonic conditions at 25 °C for 30 minutes was employed for the extraction of COCs. Gas chromatography mass spectrometry (GC-MS) utilizing a DB-5MS column facilitated the separation and detection of target analytes. SIM ionization mode was utilized with target and qualifier ions for detection. Optimization of parameters such as extractant type, extraction method, and time resulted in high recoveries ranging from 95% to 105%. The calibration curve exhibited a range of 5 to 120 ng mL−1 with regression values of 0.996–0.998. The method demonstrated excellent precision with relative standard deviations (RSD) below 10% for test specimens and for pure standards. Limits of detection (LODs) was below 0.1 ng mL−1, indicating high sensitivity. Application of the developed method to real specimens successfully detected COCs at concentrations ranging from 2.60 to 9.94 ng mL−1, affirming its effectiveness in environmental monitoring and risk assessment. [ABSTRACT FROM AUTHOR]