Facet to Facet Linking of Shape Anisotropic Inorganic Nanocrystals with Site Specific and Stoichiometric Control

作者: Sabyasachi Chakrabortty , Asim Guchhait , Xuanwei Ong , Nimai Mishra , Wen-Ya Wu

DOI: 10.1021/ACS.NANOLETT.6B02875

关键词: Materials scienceNanorodNanostructureNanoparticleNanotechnologyChemical engineeringNanocrystalSolventStoichiometryLigandFabrication

摘要: Nonclassical growth mechanisms such as self-assembly and oriented attachment are effective ways to build complex nanostructures from simpler ones. In the latter case, nanoparticle components electronically coupled; however, control over between nanoparticles is highly challenging generally requires a delicate balance dipole-, ligand-, solvent-based interactions. To this end, we perform incomplete cation exchange with Ag+ (Cu+) on CdSe-seeded CdS nanorods tetrapods exclusively convert their tips into small Ag2S (Cu2S) domains. Selective removal of ligands these inorganic domains results in spontaneous, site-specific bridging nanoparticles. Using method, demonstrate fabrication polymer-like linear branched enhanced electrical properties, well stoichiometric formation homo- heterodimers tetramers. We show that linked structures can then be completely exchanged Pb2+...

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