论文标题
赤铁矿上的碳沉积（$α$ -fe $ _2 $ o $ _3 $）纳米纸在空中退火：形态学研究，带有放牧发病率的小角度X射线散射（GISAXS）
Carbon deposition on hematite ($α$-Fe$_2$O$_3$) nanocubes by an annealing in the air: morphology study with grazing incidence small angle X-ray scattering (GISAXS)
论文作者
论文摘要
Gisaxs已用于研究$α$ -FE $ _2 $ o $ $ _3 $纳米纸的形态变化。将纳米管的亚层沉积在Si（100）底物上。虽然在真空中以400 $^\ circ $ c进行退火并不会从准备的纳米纸子分子层中改变GISAXS模式，但在相同温度下在空气中退火显着改变了GISAXS模式。 SEM图像表明，基于拉曼测量值，将通电的纳米管涂有薄层，这些层被鉴定为无定形碳层。 GISAXS模拟来自纳米管的形态学，具有38 nm侧长和核心壳（纳米核核和7 nm厚的碳壳），分别从真空退火和被空气的纳米管中很好地复制了测得的模式。当前的研究为通过监测沉积的碳厚度监测碳构成纳米颗粒的碳沉积的原位表征提供了新的方法。
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.
