Aqueous-phase reactions on hollow silica-encapsulated semiconductor nanoheterostructures

Journal of the American Chemical Society
Jie LianYinthai Chan

Abstract

We introduce a facile and robust methodology for the aggregation-free aqueous-phase synthesis of hierarchically complex metal-semiconductor heterostructures. By encapsulating semiconductor nanostructures within a porous SiO(2) shell with a hollow interior, we can isolate each individual particle while allowing it access to metal precursors for subsequent metal growth. We illustrate this by Pt deposition on CdSe-seeded CdS tetrapods, which we found to be facilitated via the surprising formation of a thin interfacial layer of PtS coated onto the original CdS surface. We took advantage of this unique architecture to perform cation exchange reactions with Ag(+) and Pd(2+), thus demonstrating the feasibility of achieving such transformations in complex metal-semiconductor nanoparticle systems.

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Citations

May 9, 2015·Nanoscale·Cheng-Han LinChung-Yuan Mou
Aug 24, 2017·Journal of Functional Biomaterials·Mohammad S YazdanparastEmily J McLaurin
Nov 13, 2013·Chemical Communications : Chem Comm·Shunsheng CaoAnthony P F Turner
Nov 29, 2017·Nanoscale·Brian B LynchJoseph B Tracy
Jul 3, 2021·Journal of the American Chemical Society·Anubhab AcharyaIn Su Lee
Aug 26, 2017·ACS Applied Materials & Interfaces·Daun KimIn Su Lee

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