Functionalization of silicon step arrays II: Molecular orientation of alkanes and DNA

Functionalization of silicon step arrays II: Molecular orientation of alkanes and DNA
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硅阶梯阵列的功能化 II:烷烃和 DNA 的分子取向

DOI:
10.1063/1.1397297
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发表时间:
2001
影响因子:
3.2
通讯作者:
F. Himpsel
F. Himpsel
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
J. Crain;A. Kirakosian;J.;Yuedong Gu;R. Shah;N. Abbott;F. Himpsel

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烷烃和DNA通过巯基吸附在阶梯Si(111)7×7表面上模板化的超薄金膜上。吸附分子的取向由c1s和n1s核心能级的偏振依赖近边x射线吸收精细结构光谱确定。在极性分布中发现了各向异性,这与分子具有相对于正态而具有随机方位角分布的优选倾斜角的模型相一致。为了获得最大的覆盖和定向覆盖层,有必要沉积超过3nm的Au(12层单层)。
Alkanes and DNA are adsorbed via thiol groups on ultrathin gold films that have been templated on stepped Si(111)7×7 surfaces. The orientation of the adsorbed molecules is determined by polarization-dependent near edge x-ray absorption fine structure spectroscopy from the C 1s and N 1s core levels. An anisotropy in the polar distribution is found which is consistent with models in which the molecules have a preferred tilt angle with respect to normal but a random azimuthal distribution. In order to obtain maximum coverage and an oriented overlayer it is necessary to deposit more than 3 nm of Au (12 monolayers).
通过 X 射线吸收光谱分析 DNA 和相关分子中的氮化学结构。
DOI: 10.1016/0167-4781(92)90157-u
发表时间: 1992
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Kirtley,SM;Mullins,OC;Chen,J;vanElp,J;George,SJ;Chen,CT;O'Halloran,T;Cramer,SP
通讯作者: Cramer,SP
DOI: 10.1021/bc960070o
发表时间: 1997-01-01
影响因子: 4.7
作者:
Kelley, SO;Barton, JK;Hill, MG
通讯作者: Hill, MG