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Au@Cu Nanoarrays with Uniform Long-Range Ordered Structure: Synthesis and SERS Applications
摘要： The nanostructures with uniform long-range ordered structure are of crucial importance for performance standardization of high-quality surface-enhanced Raman scattering (SERS) spectra. In this paper, we described the fabrication and SERS properties of Au decorated Cu (Au@Cu) nanoarrays. The Cu nanoarrays with uniform long-range ordered structure were first synthesized by in-situ electrochemistry assembly on insulated substrate. The Cu nanoarrays can reach a size of centimeters with strictly periodic nano-microstructure, which is beneficial for the production and performance standardization of SERS substrates. Then Au nanoparticals were decorated on the Cu nanoarrays by galvanic reaction without any capping agent. The obtained Au@Cu nanoarrays exhibit excellent SERS activity for 4-Mercaptopyridine, and the sensitivity limit is as low as 10?8 M. Therefore, this facile route provides a useful platform for the fabrication of SERS substrates based on nano ordered arrays.
关键词： Au nanoparticles,Cu nanoarrays,surface decoration,surface-enhanced Raman scattering (SERS)
更新于2025-09-23 15:23:52
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A robust SiC nanoarray blue-light photodetector
摘要： Silicon carbide (SiC) is recognized as one of the most important candidates of third generation semiconductors with totally superior physical/chemical properties and exciting applications in opto/electronic devices. In the present work, we report the exploration of high-performance blue-light photodetectors on both rigid and flexible substrates by using SiC nanoarrays, which are aligned by dielectrophoresis. The rise and decay times of the photodetector assembled on a rigid (i.e., SiO2/Si) substrate are B0.39 and 0.56 s, respectively, with an external quantum e?ciency of 3394%, which suggested that the SiC nanoarray photodetector has high sensitivity, fast responsivity and excellent reproducibility to light irradiation with a wavelength of 445 nm. Meanwhile, 73% of the maximum photocurrent response can be maintained after 6 months. Furthermore, the as-constructed flexible photodetector based on the polyethylene terepthalate (PET) substrate was highly stable against repeated bending, demonstrating that the as-constructed SiC photodetector was robust with high flexibility and electrical stability.
关键词： SiC,nanoarrays,dielectrophoresis,flexible substrate,blue-light photodetector
更新于2025-09-19 17:13:59
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The transparent Schottky junction of reduced graphene oxide/SnO <sub/>2</sub> nanoarrays towards enhanced broadband photoresponse
摘要： The rGO/SnO2 nanoarrays (rGO/SnO2 NAs) Schottky junction is synthesized by a series of RF magnetron sputtering, hydrothermal and electrochemical deposition. The unique transparent junction exhibits the broadband photoelectric responses from the ultraviolet to visible light. As shown, the proper rGO/SnO2 NAs display highly transparency of about ~60% and dramatically enhance photoelectric conversion of about ~100 times than that of the initial Schottky junction. Finally, the mechanism of the Schottky junction is investigated.
关键词： reduced graphene oxide,broadband photoresponse,transparent Schottky junction,SnO2 nanoarrays
更新于2025-09-16 10:30:52