Publications by authors named "Pengxing Sha"
Article Synopsis
- A method was created to produce Au-Au nanorod array substrates, enhancing surface-enhanced Raman scattering (SERS) performance by adding granular structures to the existing Au nanorod array.
- * The enhanced SERS effect allows for improved detection sensitivity, reaching as low as 10 M with probe molecules compared to traditional Au nanorod arrays.
- * The substrate was effectively used for pesticide detection and featured an advanced analytical model combining random forests and a convolutional neural network for precise identification of specific chemicals like thiram.
This study presents a novel sandwich composite structure that was designed for the ultra-sensitive detection of cyclotrimethylenetrinitramine (RDX). Au nanorod arrays (Au NRAs) were prepared and bound to 10M 6-MNA as adsorption sites for RDX, while Au nanorods (Au NRs) were modified using 10M 6-MNA as SERS probes. During detection, RDX molecules connect the SERS probe to the surface of the Au NRAs, forming a novel type of Au NRAs-RDX-Au NRs 'sandwich' composite structure.
View Article and Find Full Text PDFGold (Au) and silver (Ag) are the main materials exhibiting strong Surface-Enhanced Raman Scattering (SERS) effects. The Ag nano-rods (AgNRs) and Au nano-rods (AuNRs) SERS substrates prepared using the technology of the oblique angle deposition (OAD) process have received considerable attention in recent years because of their rapid preparation process and good repeatability. However, AgNR substrates are unstable due to the low chemical stability of Ag.
View Article and Find Full Text PDFUltra-sensitive detection of 2,4,6-trinitrotoluene (TNT) plays an important role in society security and human health. The Raman probe molecule p-aminothiophenol (PATP) can interact with TNT in three ways to form a TNT-PATP complex. In this paper, a 'sandwich' structure was developed to detect TNT with high sensitivity.
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