Colloidal Atomic Layer Deposition with Stationary Reactant Phases Enables Precise Synthesis of "digital" II-VI Nano-heterostructures with Exquisite Control of Confinement and Strain

Abhijit Hazarika, Igor Fedin, Liang Hong, Jinglong Guo, Vishwas Srivastava, Wooje Cho, Igor Coropceanu, Joshua Portner, Benjamin T. Diroll, John P. Philbin, Eran Rabani, Robert Klie, Dmitri V. Talapin

Research output: Contribution to journalArticlepeer-review

Abstract

In contrast to molecular systems, which are defined with atomic precision, nanomaterials generally show some heterogeneity in size, shape, and composition. The sample inhomogeneity translates into a distribution of energy levels, band gaps, work functions, and other characteristics, which detrimentally affect practically every property of functional nanomaterials. We discuss a novel synthetic strategy, colloidal atomic layer deposition (c-ALD) with stationary reactant phases, which largely circumvents the limitations of traditional colloidal syntheses of nano-heterostructures with atomic precision. This approach allows for significant reduction of inhomogeneity in nanomaterials in complex nanostructures without compromising their structural perfection and enables the synthesis of epitaxial nano-heterostructures of unprecedented complexity. The improved synthetic control ultimately enables bandgap and strain engineering in colloidal nanomaterials with close to atomic accuracy. To demonstrate the power of the new c-ALD method, we synthesize a library of complex II-VI semiconductor nanoplatelet heterostructures. By combining spectroscopic and computational studies, we elucidate the subtle interplay between quantum confinement and strain effects on the optical properties of semiconductor nanostructures.

Original languageEnglish
Pages (from-to)13487-13496
Number of pages10
JournalJournal of the American Chemical Society
Volume141
Issue number34
DOIs
StatePublished - 28 Aug 2019

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Fingerprint

Dive into the research topics of 'Colloidal Atomic Layer Deposition with Stationary Reactant Phases Enables Precise Synthesis of "digital" II-VI Nano-heterostructures with Exquisite Control of Confinement and Strain'. Together they form a unique fingerprint.

Cite this