Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Terahertz frequency time-domain spectroscopy has been used to analyse a wide range of samples containing cocaine hydrochloride, heroin and ecstasy--common drugs-of-abuse. We investigated real-world samples seized by law enforcement agencies, together with pure drugs-of-abuse, and pure drugs-of-abuse systematically adulterated in the laboratory to emulate real-world samples. In order to investigate the feasibility of automatic spectral recognition of such illicit materials by terahertz spectroscopy, principal component analysis was employed to cluster spectra of similar compounds.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/b817839a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
GSH and Halides Directed Controllable Synthesis of Chiral Gold Nanostars for Sensitive Diagnosis of Nephritis Types Using SERS and Transformer Neural Network.
Anal Chem
September 2025
Institute of Digitized Medicine and Intelligent Technology, Wenzhou Medical University, Wenzhou 325000, P. R. China.
Surface-enhanced Raman spectroscopy (SERS) has shown potential for early disease diagnosis via urinary metabolomics, but still faces challenges in achieving stable hot spots and processing complex clinical data. In this study, the preparation of chiral gold nanostars with precisely controllable branch size, number, and sharpness was realized by investigating the effects of l-GSH and CTA ( indicates halides) on site occupancy, reduction rate, and selective adsorption on crystal facets. Raman spectroscopic characterization using rhodamine 6G (R6G) as a reporter molecule revealed that nanoparticles with fewer branches, larger branch bases, and smoother surfaces exhibited excellent SERS activity, with an analytical enhancement factor (AEF) of 5.
View Article and Find Full Text PDFProbing the Influence of Water on the Molecular Mobility of PVP/VA using Terahertz Spectroscopy.
Mol Pharm
September 2025
Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, U.K.
The presence of water significantly impacts the physical stability of amorphous solid dispersions (ASDs) by altering polymer molecular mobility. This study investigates the influence of low levels of absorbed water on the molecular dynamics and glass transition behavior of amorphous poly(vinylpyrrolidone--vinyl acetate) (PVP/VA). Melt-quenched PVP/VA discs were conditioned at controlled relative humidities (RH 8.
View Article and Find Full Text PDFChemically and Electromagnetically dual-enhanced COFs-Au@AgNPs SERS sensor integrated with deep learning for ultrasensitive detection of neonicotinoid pesticides.
Anal Chim Acta
November 2025
Measurement Technology & Instrumentation Key Laboratory of Hebei Province, Institute of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, China.
Background: With the development of modern agriculture, neonicotinoid pesticides have been widely used due to their high efficiency and strong systemic properties. However, excessive use leads to the accumulation of residues in the food chain, threatening the ecosystem and human health. Pesticide residues are easily accumulated in oilseed crops and become concentrated during the edible oil refining process.
View Article and Find Full Text PDFAnharmonic Phonon Scattering Triggering Multi-ion Migration in Oxide-Based Superionic Conductors.
J Am Chem Soc
September 2025
Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea.
The thermodynamic equilibrium assumption often invoked in modeling ion migration in solid-state materials remains insufficient to capture the true migration behavior of Li ions, particularly in less-crystalline superionic conductors that exhibit anomalously high Li ion conductivity. Such materials challenge classical frameworks and necessitate a lattice dynamics-based perspective that explicitly accounts for nonequilibrium phonon interactions and transient structural responses. Here, we uncover a phonon-governed Li ion migration mechanism in garnet-structured superionic conductors by comparing Ta-doped LiLaZrTaO (LLZTO4) to its undoped analogue, LiLaZrAlO (LLZO).
View Article and Find Full Text PDFSpectroscopic characterization of three fungicides using terahertz spectroscopy and DFT theory, combined with convolutional neural networks for quantitative analysis of tebuconazole.
Spectrochim Acta A Mol Biomol Spectrosc
August 2025
School of Aeronautics and Astronautics, Guilin University of Aerospace Technology, China.
Fungicides are essential agrochemicals for the prevention and control of plant diseases. Counterfeit products, often lacking enough active ingredients, can compromise disease management and pose risks to agricultural safety. Precise quantification of the chemical structure and concentration of active components enables reliable authentication of fungicide formulations, ensuring their efficacy in crop protection and supporting the quality and safety of agricultural production.
View Article and Find Full Text PDF