Institute of Biomedical Engineering, National Taiwan University, Taipei 10617, Taiwan ; Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Da'an District, Taipei 10617, Taiwan.
Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Da'an District, Taipei 10617, Taiwan.
Nanoscale Res Lett. 2014 May 21;9(1):249. doi: 10.1186/1556-276X-9-249. eCollection 2014.
We here report a simple and efficient method to grow single-layer bismuth nanoparticles (BiNPs) with various sizes on glass substrates. Optimal conditions were found to be 200°C and 0.12 W/cm(2) at a growth rate of 6 Å/s, with the deposition time around 40 s. Scanning electron microscope (SEM) images were used to calculate the particle size distribution statistics, and high-resolution X-ray diffraction (XRD) patterns were used to examine the chemical interactions between BiNPs and the substrates. By measuring the transmission spectra within the range of 300 to 1,000 nm, we found that the optical bandgap can be modulated from 0.45 to 2.63 eV by controlling the size of these BiNPs. These interesting discoveries offer an insight to explore the dynamic nature of nanoparticles.
我们在这里报告了一种简单有效的方法，可在玻璃衬底上生长具有各种尺寸的单层铋纳米粒子（BiNPs）。优化条件为生长速率为 6 Å/s 时的 200°C 和 0.12 W/cm²，沉积时间约为 40 s。扫描电子显微镜（SEM）图像用于计算粒径分布统计数据，高分辨率 X 射线衍射（XRD）图案用于检查 BiNPs 与衬底之间的化学相互作用。通过测量 300 至 1000nm 范围内的透射光谱，我们发现通过控制这些 BiNPs 的尺寸，可以将光学带隙从 0.45 调节到 2.63 eV。这些有趣的发现为探索纳米粒子的动态性质提供了一个视角。
