This Feature highlights recent advances on mid-infrared thin-film waveguide technology and on-chip photonics facilitating next-generation label-free chem/bio sensor and assay platforms. Complemented by more recent advancements toward on-chip semiconductor waveguides, it is anticipated that label-free integrated mid-infrared sensing schemes will readily complement existing chem/bio sensor technologies in applications ranging from process monitoring and environmental analysis to biomedical diagnostics and point-of-care devices.
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http://dx.doi.org/10.1021/acs.analchem.5b04143 | DOI Listing |
Mikrochim Acta
January 2025
Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, 395 007, India.
A fluorescence "turn-off-on" nanoprobe is designed by using europium-doped strontium molybdate perovskite quantum dots (Eu:SMO PQDs) for the sequential detection of hypoxanthine (Hx) and Fe. The Eu:SMO PQDs were prepared by the sol-gel method using Sr(NO), (NH)MoO.4HO, and Eu(OCOCH) as precursors.
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September 2024
Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India.
A hydrothermal synthetic method is established to produce blue fluorescent Eu-doped niobium carbide MXene quantum dots (Eu-NbC MQDs). The synthesized Eu-NbC MQDs demonstrated a quantum yield of 20.61% and a maximum emission intensity at 405 nm.
View Article and Find Full Text PDFAnalyst
September 2024
School of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
Biological weapons, primarily dispersed as aerosols, can spread not only to the targeted area but also to adjacent regions following the movement of air driven by wind. Thus, there is a growing demand for toxin analysis because biological weapons are among the most influential and destructive. Specifically, such a technique should be hand-held, rapid, and easy to use because current methods require more time and well-trained personnel.
View Article and Find Full Text PDFSensors (Basel)
July 2024
Chem-Bio Technology Center, Agency for Defense Development, Daejeon 34186, Republic of Korea.
An interpolation method, which estimates unknown values with constrained information, is based on mathematical calculations. In this study, we addressed interpolation from an image-based perspective and expanded the use of image inpainting to estimate values at unknown points. When chemical gas is dispersed through a chemical attack or terrorism, it is possible to determine the concentration of the gas at each location by utilizing the deployed sensors.
View Article and Find Full Text PDFSensors (Basel)
June 2024
School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.
Chemical warfare agents pose a serious threat due to their extreme toxicity, necessitating swift the identification of chemical gases and individual responses to the identified threats. Fourier transform infrared (FTIR) spectroscopy offers a method for remote material analysis, particularly in detecting colorless and odorless chemical agents. In this paper, we propose a deep neural network utilizing a semi-supervised autoencoder (SSAE) for the classification of chemical gases based on FTIR spectra.
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