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Piezoresistive Cantilever Microprobe with Integrated Actuator for Contact Resonance Imaging.
Sensors (Basel)
January 2025
Institute of Semiconductor Technology (IHT), Technische Universität Braunschweig, Hans-Sommer-Straße 66, 38106 Braunschweig, Germany.
A novel piezoresistive cantilever microprobe (PCM) with an integrated electrothermal or piezoelectric actuator has been designed to replace current commercial PCMs, which require external actuators to perform contact-resonance imaging (CRI) of workpieces and avoid unwanted "forest of peaks" observed at large travel speed in the millimeter-per-second range. Initially, a PCM with integrated resistors for electrothermal actuation (ETA) was designed, built, and tested. Here, the ETA can be performed with a piezoresistive Wheatstone bridge, which converts mechanical strain into electrical signals by boron diffusion in order to simplify the production process.
View Article and Find Full Text PDFElemental cryo-imaging reveals SOS1-dependent vacuolar sodium accumulation.
Nature
January 2025
Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
Increasing soil salinity causes significant crop losses globally; therefore, understanding plant responses to salt (sodium) stress is of high importance. Plants avoid sodium toxicity through subcellular compartmentation by intricate processes involving a high level of elemental interdependence. Current technologies to visualize sodium, in particular, together with other elements, are either indirect or lack in resolution.
View Article and Find Full Text PDFFiber-Optic Photoacoustic Gas Microprobe Based on Linear Spot-Type Multipass Cell.
Anal Chem
January 2025
School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning 116024, China.
A linear spot-type multipass cell-enhanced fiber-optic photoacoustic gas microprobe is proposed. To further reduce the volume of the gas chamber and enhance the photoacoustic signal, we designed the cross section of the photoacoustic tube as a slit with a height of 10 mm and a width of 1.5 mm.
View Article and Find Full Text PDFMineral-dependent release, migration and enrichment of toxic elements during black shale weathering: An integrated study from profile scale to mineral scale.
J Hazard Mater
January 2025
School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan Province 610031, China.
Chemical weathering of lithologies with high geochemical backgrounds such as black shale has been proposed to be a critical source for toxic elements in soil and water systems. However, mechanisms controlling the release, migration and enrichment of toxic elements during black shale weathering are poorly understood. This study utilized a suite of micro analytical techniques such as TESCAN integrated mineral analyzer (TIMA), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS) and electron micro-probe analysis (EMPA) to elucidate the intimate relationship between mineralogical transformations and elemental behaviors from profile scale to mineral scale.
View Article and Find Full Text PDFA rare case of Na/Zn isomorphism in the crystal structure of acentric zincophosphate NaZn[Zn(PO)].
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russian Federation.
A microporous zincophosphate with the idealized formula NaZn[Zn(PO)] was obtained through high-temperature hydrothermal synthesis and characterized by scanning electron microscopy, microprobe analysis and X-ray diffraction. The orthorhombic compound, which crystallizes in acentric space group Pna2 with unit-cell parameters a = 12.9901 (2), b = 16.
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