Monolayer Formation of Luminescent Germanium Nanoparticles on Silica Surface in Aqueous Buffer Solution
Monolayer Formation of Luminescent Germanium Nanoparticles on Silica Surface in Aqueous Buffer Solution
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缓冲水溶液中二氧化硅表面单层发光锗纳米颗粒的形成
DOI：
10.1166/jnn.2014.8640
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发表时间：
2014
影响因子：
--
通讯作者：
N. Shirahata
中科院分区：
文献类型：
--
作者：
松岡 智雄;古賀 智之;東 信行;古賀 智之;N. Shirahata
本文报道了在二氧化硅基底上形成单层锗纳米粒子（Ge NP）。该纳米颗粒是通过氢化物还原 GeCl4（封装有二甲基二辛基溴化铵反胶束）和氢化铝锂，然后在铂催化剂存在下对烯丙胺进行氢甲酰化来制备的。所得纳米颗粒表现出蓝色光致发光特性。由于末端胺的存在，纳米粒子在缓冲水溶液中高度溶解。为了制造单层Ge纳米颗粒，使用多功能微阵列研究了纳米颗粒的化学反应性，其中不同种类的硅氧烷单层在二氧化硅基底上周期性排列。我们使用荧光显微镜观察纳米颗粒的末端胺是否识别微阵列中的特定单层。在荧光观察方面，单层覆盖的微米尺寸域的整个表面均匀地发出蓝光。这表明发光纳米颗粒的高度覆盖覆盖了微阵列中的单层区域，并且意味着相邻纳米颗粒之间的能量转移不会发生猝灭。
The present paper reports monolayer formation of germanium nanoparticldes (Ge NPs) on silica substrate. The NPs were prepared by hydride reduction of GeCl4, which is encapsulated with an inverse micelle of dimethyldioctylammonium bromide, with lithium aluminum hydride, and subsequent hydrogermylation of allylamine in the presence of platinum catalyst. The resultant NPs showed the blue photoluminescence property. Due to the terminal amine, the NPs were soluble highly in aqueous buffer solution. To fabricate a monolayer of Ge NPs, the chemical reactivity of the NPs was studied using a multi-functional microarray in which different kinds of siloxane monolayers were periodically aligned on a silica substrate. We observed using fluorescence microscope whether the terminal amines of the NPs recognize the specific monolayers in the microarray. In terms of fluorescence observation, the entire surface of the monolayer-covered microsize-domains emits uniformly the blue light. This suggests a high degree of coverage of the luminescent NPs covering over the monolayer regions in the microarray, and implies the non-occurrence of quenching through energy transfer between adjacent NPs.