DNA-gold triangular nanoprism conjugates.
DNA-gold triangular nanoprism conjugates.
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DOI：
10.1002/smll.200800931
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发表时间：
2008-12
期刊：
影响因子：
13.3
通讯作者：
Mirkin, Chad A.
中科院分区：
文献类型：
--
作者：
Millstone, Jill E.;Georganopoulou, Dimitra G.;Xu, Xiaoyang;Wei, Wei;Li, Shuyou;Mirkin, Chad A.
在过去的二十年里，人们付出了巨大的努力来理解、控制和利用纳米材料的形态与其物理和化学性质之间的关系。[1，2]事实上，大量的努力集中在控制纳米结构的尺寸，形状和组成上。然而，同样重要的是这种结构的表面化学，特别是当人们认为表面与体原子的比率比微观或宏观系统高得多时。例如，纳米颗粒的表面等离子体共振（SPR）高度依赖于围绕它们的介电介质，包括分子和溶剂的吸附层。[3，4]纳米颗粒的催化活性也高度依赖于吸附物。[5，6]事实上，控制纳米颗粒表面的结构和化学功能化的方法的发展是研究的一个主要领域，并导致了这类重要材料的新特性和应用的发现。[7]在各向同性金属纳米颗粒的情况下，功能化导致了各种令人兴奋的科学见解和应用，包括使用纳米颗粒作为光谱标记，[8]基因调控剂，[9]和超灵敏的生物诊断工具。[10]一般来说，对各向异性结构的研究较少，但对纳米棒和纳米壳结构进行了一些重要的观察和进展。[11-14]例如，Gole和Murphy报道了当将相互连接的链霉亲和素蛋白添加到含有它们的胶体中时，用生物素-二硫化物官能化的金纳米棒将以端对端的方式组装。作者得出结论，这种组装行为表明末端选择性官能化。[12]Mann和同事描述了一个类似的例子，用三聚氰胺修饰的纳米棒，但与Murphy系统相反，他们观察到纳米棒沿着它们的长轴的片状组装。[11]这些结果对理解和控制各向异性纳米粒子的表面选择性功能化提出了挑战，解决这一挑战的理想系统是可以高产率制备的各向异性纳米粒子，其由具有众所周知的表面化学的金属组成，具有强的，结构和环境敏感的光学特性，并且具有明确的晶体学方面。最近，我们和其他人已经开发出合成具有这些特性的金或银制成的三棱柱的方法。[15-18]这种类型的纳米棱镜通常是单晶，在某些情况下是孪生的，具有宽的，
Over the past two decades, there has been an enormous effort to understand, control, and use the relationship between the morphology of nanomaterials and their physical and chemical properties.[1, 2] Indeed, a great deal of effort has focused on controlling the size, shape, and composition of nanostructures. However, equally important is the surface chemistry of such structures, especially when one considers that the ratio of surface to bulk atoms is much higher than that in micro-or macroscopic systems. For example, the surface plasmon resonances (SPRs) of nanoparticles are highly dependent upon the dielectric medium that surrounds them, including adlayers of molecules and solvent.[3, 4] Catalytic activity of a nanoparticle is also highly dependent upon adsorbate.[5, 6] Indeed, the development of ways to control the structure and chemical functionalization of a nanoparticle surface is a major area of research, and has led to the discovery of new properties and applications for this important class of materials.[7] In the case of isotropic metal nanoparticles, functionalization has led to a variety of exciting scientific insights and applications, including the use of nanoparticles for spectroscopic labels,[8] gene-regulation agents,[9] and ultrasensitive biodiagnostic tools.[10] In general, less has been done with anisotropic structures, but there have been some important observations and advances made for nanorod and nanoshell structures.[11–14] For example, Gole and Murphy have reported that gold nanorods functionalized with biotin-disulfide will assemble in an end-to-end manner when interconnecting streptavidin proteins are added to a colloid containing them. The authors concluded that such assembly behavior was indicative of end-selective functionalization.[12] Mann and co-workers described a similar example with oligonucleotide-modified nanorods, but in contrast with the Murphy system, they observe sheet-like assembly of nanorods along their long axes.[11] These results present a challenge to both understand and establish control over the face-selective functionalization of anisotropic nanoparticles.An ideal system to address this challenge is an anisotropic nanoparticle that can be made in high yield, which is composed of a metal with well-known surface chemistry, exhibits strong, architecture-and environment-sensitive optical features, and has well-defined crystallographic facets. Recently, we and others have developed methods for synthesizing triangular prisms, made of gold or silver, that exhibit these characteristics.[15–18] Nanoprisms of this type are generally single crystals, in some cases twinned, with broad,
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影响因子：
64.8
作者：
Mirkin, CA;Letsinger, RL;Storhoff, JJ
通讯作者：
Storhoff, JJ
DOI：
10.1073/pnas.2232479100
发表时间：
2003-11-11
影响因子：
11.1
作者：
Hirsch, LR;Stafford, RJ;West, JL
通讯作者：
West, JL
影响因子：
1.9
作者：
Rupprechter, G;Unterhalt, H;Freund, HJ
通讯作者：
Freund, HJ
影响因子：
8.6
作者：
Ah, CS;Yun, YJ;Yun, WS
通讯作者：
Yun, WS
影响因子：
15
作者：
Peng, XG;Wickham, J;Alivisatos, AP
通讯作者：
Alivisatos, AP