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Ballistic glancing angle deposition of inclined Ag nanorods limited by adatom diffusion

机译:受原子扩散限制的倾斜Ag纳米棒的弹道掠射角沉积。

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The growth dynamics of 1D nanorods (NRs) composed of noble metals is ambiguous during glancing angle deposition (GLAD). The continuum equation (CE) model describes ballistic deposition limited by adatom diffusion, not verified in GLAD of noble metal NRs. In this work, GLAD is operated at T_s (substrate temperature) below room temperature to create inclined Ag NRs, and the CE fits the growth orientation of NRs with deposition angles at fixed T_s well. The CE fitting evaluates the diffusion activation energy (E_d) as 0.23 eV, showing that Ag NRs are poly-crystalline with dominant (111), as confirmed by XRD. This work introduces an effective approach to study the growth thermodynamics of 1D nanostructures and evaluate the E d of adatoms with relatively low melting points.
机译:在掠射角沉积(GLAD)过程中,由贵金属组成的一维纳米棒(NRs)的生长动力学模棱两可。连续方程(CE)模型描述了受原子扩散限制的弹道沉积,未在贵金属NR的GLAD中验证。在这项工作中,GLAD在低于室温的T_s(基板温度)下运行,以产生倾斜的Ag NRs,并且CE使NRs的生长方向与沉积角度固定在固定的T_s井上。 CE拟合将扩散活化能(E_d)评估为0.23 eV,这表明Ag NRs是具有优势(111)的多晶,如XRD所证实。这项工作引入了一种有效的方法来研究一维纳米结构的生长热力学,并评估熔点相对较低的吸附原子的E d。

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