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RESEARCH PRODUCT
Nanoscale X-ray detectors based on individual CdS, SnO2 and ZnO nanowires
Aleksejs ZolotarjovsAlexei KuzminEdgars ButanovsBoris Polyakovsubject
PhysicsNuclear and High Energy Physicsbusiness.industryNanowireX-ray detectorchemistry.chemical_element02 engineering and technologyTungsten010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesAnodechemistryTransmission electron microscopyOptoelectronicsCharge carrierElectrical measurements0210 nano-technologybusinessInstrumentationNanoscopic scaledescription
Abstract The development of nanoscale X-ray sensors is of crucial importance to achieve higher spatial resolution in many X-ray-based techniques playing a key role in materials science, healthcare, and security. Here, we demonstrate X-ray detection using individual CdS, SnO 2 , and ZnO nanowires (NWs). The NWs were produced via vapor–liquid–solid technique and characterized using X-ray diffraction, scanning, and transmission electron microscopy . Electrical measurements were performed under ambient conditions while exposing two-terminal NW-based devices to X-rays generated by a conventional tungsten anode X-ray tube. Fast and stable nanoampere-range X-ray beam induced current (XBIC) in response to X-ray illumination was observed. The high XBIC measured in the NW devices could be attributed to the efficient transport and collection of generated charge carriers due to the single-crystalline nature of NWs and the short NW length. Such fast-response and high-sensitivity nanoscale X-ray detectors can find applications in sub-micron resolution imaging and nanofocused beam shape measurements.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-10-01 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |