Influence of Alkalinity and Steric Hindrance of Lewis-Base Catalysts on Atomic Layer Deposition of SiO2
Influence of Alkalinity and Steric Hindrance of Lewis-Base Catalysts on Atomic Layer Deposition of SiO2
复制标题
路易斯碱催化剂的碱度和位阻对SiO2原子层沉积的影响
DOI:
10.1021/jp2048663
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发表时间:
2011-11
影响因子:
3.7
通讯作者:
Ma, Jing
中科院分区:
文献类型:
--
作者:
Chen, Shuang;Fang, Guoyong;Qian, Xu;Li, Aidong;Ma, Jing
The effects of different Lewis-base catalysts, NC5H5, N(CH3)3, NH3, NH2CH3, and NH(CH3)2, on the possible reaction pathways in atomic layer deposition (ALD) of SiO2 are investigated by density functional theory (DFT) calculations on both single and double −OH* surface models. The ALD of SiO2 undergoes successive self-terminating SiCl4 (A) and H2O (B) half reactions, respectively. On the basis of the double −OH* surface model, the rate-limiting step is the first SiCl4 half reaction with an activation energy of about 29.0 kcal/mol for the formation of the bridged −SiCl2*– group in the absence of catalysts. The activation energy of the subsequent H2O half reaction is slightly lower than that of the first half reaction. The selected Lewis-base catalysts can effectively catalyze both half reactions in the ALD growth of SiO2 through strong hydrogen bonding interaction with reaction substrates, with the activation energies of both half reactions reduced to about 1.3–14.6 kcal/mol. However, the desorption of bypr...
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影响因子:
3.3
作者:
C. Mui;C. Musgrave
通讯作者:
C. Mui;C. Musgrave
DOI:
10.1017/cbo9780511614569
发表时间:
2005
期刊:
--
影响因子:
--
作者:
F. Weinhold;C. Landis
通讯作者:
F. Weinhold;C. Landis
影响因子:
56.9
作者:
Klaus, JW;Sneh, O;George, SM
通讯作者:
George, SM
影响因子:
1.9
作者:
SNEH, O;WISE, ML;GEORGE, SM
通讯作者:
GEORGE, SM
影响因子:
3.3
作者:
Y. Okamoto
通讯作者:
Y. Okamoto