Publications by authors named "HuaChun Zhu"
Infrared spectroscopy is a powerful spectroscopic technique for investigating the vibrational and electronic states of matter. Temperature and magnetic field provide important methods to manipulate these states by an external field. Recent advancements have underscored the necessity for investigating small samples like two-dimensional materials with high spatial resolution.
View Article and Find Full Text PDFL-Glutamic acid (L-Glu) is a basic unit of proteins and also serves as an important neurotransmitter in the central nervous system. Its structural properties are critical for biological functions and selective receptor recognition. Although this molecule has been extensively studied, the low frequency vibrational behavior that is closely related to conformational changes and the intermolecular interactions between L-Glu and its receptors are still unclear.
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- Surface-enhanced Raman scattering (SERS) is a highly effective technique for detecting small amounts of molecules with great specificity, and new 3D SERS substrates are being developed to improve performance.
- A novel SERS-active substrate using large-scale hierarchical Si nanoarrays and gold nanoparticles was created, featuring an umbrella-frame design for improved sensitivity and uniformity in detecting molecules like R6G.
- This new substrate not only achieves a low detection limit and high reproducibility, but can also be cleaned and reused multiple times, making it a promising tool for trace detection in chemical and biological studies.
Developing the synchrotron radiation experiment method based on combined technology offers more information on the formation mechanism of new materials and their physical and chemical properties. In this study, a new small-angle x-ray scattering/ wide-angle x-ray scattering/ Fourier-transform infrared spectroscopy (SAXS/WAXS/FTIR) combined setup was established. Using this combined SAXS/WAXS/FTIR setup, x-ray and FTIR signals can be obtained simultaneously from the same sample.
View Article and Find Full Text PDF[Study of Terahertz Amplitude Imaging Based on the Mean Absorption].
Guang Pu Xue Yu Guang Pu Fen Xi
December 2015
Article Synopsis
- A new terahertz (THz) imaging method using mean absorption has been proposed to improve image clarity and information extraction.
- THz imaging is beneficial across various fields due to its low energy and non-ionizing properties, allowing detailed analysis of materials, biology, and food safety.
- Experimental results indicate that this method can provide clearer images and better representation of sample characteristics compared to traditional THz imaging techniques.
A space-based tempo-spatially modulated polarization atmosphere Michelson interferometer (TSMPAMI) is described. It uses the relative movement between the TSMPAMI and the measured target to change optical path difference. The acquisition method of interferogram is presented.
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