Publications by authors named "Ren-Xi Gao"
Article Synopsis
- Photoacoustic imaging using gold nanoparticles is gaining attention, particularly due to how their response to light varies with the dielectric constant, which is influenced by both wavelength and temperature.
- This study employs the Drude-Lorentz model and Mie theory to calculate the dielectric constant and absorption efficiency of gold nanospheres, and uses finite element methods to simulate heat transfer in their surrounding environment.
- The findings reveal that neglecting the temperature impact on the dielectric constant can result in significant inaccuracies (over 20-30%) in measuring the photothermal and photoacoustic responses, highlighting the importance of considering temperature effects for improved detection technologies and temperature measurement techniques.
Newly emerging two-dimensional transition metal dichalcogenide HfS2 has received considerable attention recently due to its ultrahigh photoresponsivity, well-balanced carrier mobility and an appropriate band gap which offer potential in electronic and optoelectronic devices. In this work, HfS2 flakes up to 200 layers with varying color contrasts are fabricated and transferred on a SiO2/Si substrate. The Raman intensities of HfS2 flakes and Raman intensities of molecules adsorbed on HfS2 flakes are quantitatively studied both theoretically and experimentally by considering an optical interference effect.
View Article and Find Full Text PDFThickness identification of two-dimensional materials by optical imaging.
Nanotechnology
December 2012
Two-dimensional materials, e.g. graphene and molybdenum disulfide (MoS(2)), have attracted great interest in recent years.
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