碳在赤铁矿（$α$ $_2$ O $_3$）纳米立方体上的沉积：掠入射小角X射线散射（GISAXS）形貌研究
Carbon deposition on hematite ($α$-Fe$_2$O$_3$) nanocubes by an annealing in the air: morphology study with grazing incidence small angle X-ray scattering (GISAXS)
摘要：
利用GISAXS研究了退火处理后$α$ $_2$ O $_3$纳米立方体的形貌变化.将纳米立方体的亚单层沉积在Si（100）衬底上。虽然在真空中在400 $^\circ$ C下退火不会改变所制备的纳米立方体亚单层的GISAXS图案，但在相同温度下在空气中退火显著改变了GISAXS图案。SEM图像显示，空气退火的纳米立方体表面覆盖有薄层，基于拉曼光谱测量，这些薄层被鉴定为无定形碳层。GISAXS模拟从纳米立方体的形态与38 nm的边长和核-壳（纳米立方体核和7 nm厚的碳-壳）很好地再现了测量的图案，分别从真空退火和空气退火的纳米立方体。本研究提供了一种新的方法，原位表征碳沉积在均匀形状的纳米粒子通过监测沉积碳的厚度。
英文摘要：
GISAXS has been used to study morphology change of $α$-Fe$_2$O$_3$ nanocubes after annealing processes. A submonolayer of the nanocubes was deposited on a Si(100) substrate. While an annealing at 400 $^\circ$C in a vacuum does not change a GISAXS pattern from as-prepared nanocubes submonolayer, annealing in the air at the same temperature altered the GISAXS pattern significantly. SEM image showed that the air-annealed nanocubes were coated with thin layers which were identified as amorphous carbon layers based on Raman measurements. GISAXS simulations from morphologies of nanocube with 38 nm side-length and core-shell (nanocube-core and 7 nm thick carbon-shell) nicely reproduced measured patterns from the vacuum annealed and the air-annealed nanocubes, respectively. The current study provides new approach for in-situ characterization of carbon deposition on a uniform shape nanoparticle through monitoring of deposited carbon thickness.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
