Results 101 to 110 of about 1,622,755 (180)

Mid-Infrared Spectrometer for Black Plastics Sorting Using a Broadband Uncooled Micro-Bolometer Array

We report the design, implementation and test of a Mid-Infrared spectrometer proof-of-concept that utilizes an uncooled micro-bolometer array, sensitive in the 3–14 µm spectral range, integrated in a conventional optical dispersive ...
Xavier Brenière, Gabriel Jobert
core   +1 more source

Charge‐Transfer‐Engineered Organic/2D Hybrid Interface for Programmable SERS and Emerging Biosensing Applications

Aggregate, Volume 7, Issue 11, November 2026.
Organic/2D hybrid interfaces provide a route to regulate interfacial charge transfer and enhance surface‐enhanced Raman spectroscopy (SERS). This review links energy‐level alignment, charge transfer, excitonic interactions, and fluorescence quenching to improved signal enhancement and reproducibility, outlining materials‐design strategies for sensitive,
Abdur Rahim, Habib Ullah, Ali Bahadar, Alamgir, Esha Maqbool, Muhammad Saleem, Irfan Ullah, Abdul Samad, Liu Mei, Ningtao Cheng, De‐man Han, Sailing He   +11 more
wiley   +1 more source

Wood Species Classification in Open Set Using an Improved NNO Classifier

BioResources
A wood species classification scheme was developed based on open set using an improved Nearest Non-Outlier (NNO) classifier. Near infrared (NIR) spectral curves were collected in spectral band 950 to 1650 nm by a micro spectrometer.
Ke-Xin Zhang, Peng Zhao
doaj  

Preliminary study of muscle contraction assessment by NIR spectroscopy [PDF]

, 1998
NIR spectroscopy allows monitoring of muscle oxygenation and perfusion during contraction. The knowledge of modifications of blood characteristics in body tissues has relevant clinical interest. A compact and reliable device, which makes use of two laser
Pavesi, Roberto, Maestri, R., Felicetti, G., Lago, Paolo, Giardini, Mario E., Gelmetti, Andrea, Zambarbieri, Daniela   +6 more
core  

Portable, Benchtop and Micro‐XRF in Agriculture—Present and Future From the Hardware Perspective

X-Ray Spectrometry, Volume 55, Issue 6, Page 963-978, November/December 2026.
ABSTRACT X‐ray fluorescence (XRF) spectrometry has been an important tool in agricultural studies recently. This technique allows the multielemental, direct, and in situ analysis. The objective of this review is to evaluate the use of XRF in agriculture focusing on plant and soil samples based on indexed articles in the Scopus database from 2020 to ...
Eduardo de Almeida, Felipe Rodrigues Santos, Fabio Luiz Melquiades, Gabriel Sgarbiero Montanha, Tiago Rodrigues Tavares, Eduardo Santos, Higor José Freitas Alves da Silva, Hudson Wallace Pereira de Carvalho   +7 more
wiley   +1 more source

Polymorphism and NIR Photoluminescence of Anhydrous Ytterbium(III) Acetate: Reversible Transformations of Three Polar Structures in the Temperature Range 100–593 K

Zeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 16, November 2026.
Crystallographic variety, reversible transitions, and NIR emission of anhydrous Yb(OAc)3: identification of a new γ‐phase results in altogether three modifications all crystallizing in polar space groups related by reversible solid–solid phase transitions.
Maksim A. Zhernakov, Tobias Stürzer, Yuriy G. Denisenko, Jakob Möbs, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Wide‐Angle Domain Compatible Flexible Multispectral Stealth Metasurface for Visible Light, Laser, and Microwave

Nanophotonics, Volume 15, Issue 20, 27 October 2026.
A flexible, wide‐angle‐compatible multispectral stealth metasurface is proposed. It achieves visible camouflage and stable cooperative stealth of 10.6 μm laser and X‐band microwave across the 0°–60° incident range via layered wavelength decoupling. ABSTRACT As electromagnetic detection systems evolve toward multispectral integration and 0°–60° wide ...
Lei Wang, Cuilian Xu, Ruichao Zhu, Hao Yang, Zuntian Chu, Jinming Jiang, Yuxiang Jia, Jiechu Liu, Qi Fan, Jiafu Wang   +9 more
wiley   +1 more source

Case study: Field and in-situ identification of pigments in works of art by micro-Raman and visible-NIR reflectance spectroscopies: a polychrome 16th-century Italian fresco and black-coloured Etruscan pottery

, 2005
A portable micro-Raman spectrometer was developed and tested for field analysis of a 16th century Italian fresco. Despite the fluorescence background in the studied area of the fresco, one or more peaks were recorded with a signal-to-noise ratio ...
S. Bruni, F. Cariati, V. Guglielmi
core   +1 more source

SUB 1-Millimeter Size Fresnel Micro Spectrometer [PDF]

, 2010
An ultra-small micro spectrometer with less than 1mm diameter was constructed using Fresnel diffraction. The fabricated spectrometer has a diameter of 750 nmicrometers and a focal length of 2.4 mm at 533nm wavelength.
Koch, Laura, Park, Yeonjoon, Park, Sangloon, King, Glen, Song, Kyo D., Choi, Sang   +5 more
core  

NIR spectroscopy for personal screening [PDF]

This work presents investigations into the use of the near-infrared (NIR) signals to interrogate, detect and image specific chemical compounds of interest in a security screening application, including when such compounds are hidden behind single ...
Saleem, Aamer
core