Synthesis of gold nanorod/single-wall carbon nanotube heterojunctions directly on surfaces
Synthesis of gold nanorod/single-wall carbon nanotube heterojunctions directly on surfaces
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DOI：
10.1021/ja0521122
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发表时间：
2005-08-10
影响因子：
15
通讯作者：
Zamborini, FP
中科院分区：
文献类型：
--
作者：
Mieszawska, AJ;Jalilian, R;Zamborini, FP
这篇文章描述了直接在Si/SiOx衬底上组装的金纳米棒（Au NR）/单壁碳纳米管（SWCNT）异质结的合成。将单壁碳纳米管附着在胺功能化的Si/SiOx基底上，并通过疏水作用将Au单层保护簇（MPC）吸附到单壁碳纳米管表面。种子介导的还原HAuCl 4与抗坏血酸在十六烷基三甲基溴化铵（CTAB）的存在下到Au MPC导致更大的Au纳米结构的生长直接在单壁碳纳米管。Au NR占纳米结构的19%，其中一些直接附着在侧壁上，一些附着在SWCNT的末端。拉曼光谱测量的单壁碳纳米管之前和之后的Au纳米结构的生长表明，Au的存在导致约50倍的增强的拉曼散射信号。组合不同材料（在该示例中为Au和碳）的1D纳米结构具有根本意义，并且可以在纳米电子学、化学传感、电化学和光谱学应用中找到用途。
This contribution describes the synthesis of gold nanorod (Au NR)/single-wall carbon nanotube (SWCNT) heterojunctions assembled directly on Si/SiOxsubstrates. SWCNTs are attached to amine-functionalized Si/SiOxsubstrates, and Au monolayer-protected clusters (MPCs) are adsorbed to the surface of SWCNTs through hydrophobic interactions. Seed-mediated reduction of HAuCl4with ascorbic acid in the presence of cetyltrimethylammonium bromide (CTAB) onto the Au MPCs leads to the growth of larger Au nanostructures directly on the SWCNTs. Au NRs account for 19% of the nanostructures, some of which are attached directly to the sidewall and some at the ends of the SWCNTs. Raman spectroscopic measurements of SWCNTs before and after growth of the Au nanostructures reveal that the presence of Au leads to an approximately 50-fold enhancement of the Raman scattering signal. Combining 1D nanostructures of different materials (Au and carbon in this example) is of fundamental interest and may find use in nanoelectronics, chemical sensing, electrochemical, and spectroscopy applications.