We demonstrate a facile method termed candle soot coating (CSC) for fast developing latent fingermarks (LFMs) on various kinds of surfaces (glass, ceramic, metal, paper and adhesive tape). The CSC method can be considered as simple, fast, and low-cost as well as providing high contrast for LFM visualization in potential forensic applications.
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http://dx.doi.org/10.3390/s17071612 | DOI Listing |
Heliyon
January 2025
Department of Chemical Sciences, University of Johannesburg, PO Box 17011, Doornfontein, 2028, Johannesburg, South Africa.
Semiconductor metal oxide gas sensors are widely used to detect ethanol vapours, commonly used in industrial productions, road safety detection, and solvent production; however, they operate at extremely high temperatures. In this work, we present manganese dioxide nanorods (MnO NRs) prepared via hydrothermal synthetic route, carbon soot (CNPs) prepared via pyrolysis of lighthouse candle, and poly-4-vinylpyridine (P4VP) composite for the detection of ethanol vapour at room temperature. MnO, CNPs, P4VP, and MnO NRs-CNPs-P4VP composite were characterised using scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy.
View Article and Find Full Text PDFEnviron Pollut
December 2024
School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China; Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Jiangsu, 213164, China. Electronic address:
Photochemistry plays a significant role in the atmospheric aging processes of soot. However, the physicochemical properties and changes in environmental and health effects of soot particles from sacrificial sources after photochemical aging remain unclear. The reaction mechanisms of soot under different irradiation wavelengths require further investigation.
View Article and Find Full Text PDFUltrasonics
December 2024
Universidad Carlos III de Madrid, Avenida de la Universidad, 30, Leganes, Madrid, Spain.
The most common transducers used to generate ultrasound in medical applications are based on short electrical pulses applied to piezoelectric transducers and capacitive micromachined ultrasound transducers. However, piezoelectric transducers have a limited frequency bandwidth, defined by their physical thickness, and capacitive micromachined ultrasound transducers have poor transmission efficiency. The high frequency cutoff limits the spatial resolution of ultrasonic images.
View Article and Find Full Text PDFTalanta
April 2025
Faculty of Materials Science and Ceramics, AGH University of Krakow, Mickiewicza 30, PL-30059, Krakow, Poland. Electronic address:
The application of carbon soot as a solid-contact layer in potentiometric sensor is presented. The preparation method of carbon layer from the candle is inexpensive and as short as 10 s and was optimized and described in the scope of this paper. With the use of the proposed procedure, it is possible to cover not only the glassy carbon disc electrodes, but all surfaces of various shapes and types, like foil or paper.
View Article and Find Full Text PDFJ Colloid Interface Sci
February 2025
State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China. Electronic address:
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