Room temperature chemical transformation of SnSe to Ag<sub>2</sub>Se nanocrystals <i>via</i> cation exchange

Huang, Yiqiao; Poudeu, Pierre F. P.

doi:10.1039/d4ma00394b

Mater. Adv.

2024

DOI: 10.1039/d4ma00394b

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Room temperature chemical transformation of SnSe to Ag₂Se nanocrystals via cation exchange

Yiqiao Huang,

Pierre F. P. Poudeu

Abstract: Atomic-scale control of the chemical composition of semiconductor nanocrystals through cation exchange re-action affords greater tunability in the design of multifunctional semiconductor composite nanocrystals. Here, we report a facile route...

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Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization

Polivtseva,

Volobujeva,

Kuznietsov

et al. 2024

ACS Appl. Mater. Interfaces

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Defect engineering is an exciting tool for customizing semiconductors' structural and optoelectronic properties. Elaborating programmable methodologies to circumvent energy constraints in multievent inversions expands our understanding of the mechanisms governing the functionalization of nanomaterials. Herein, we introduce a novel strategy based on defect incorporation and solution rationalization, which triggers energetically unfavorable cation exchange reactions in extended solids. Using Sb 2 X 3 + Ag (I) → Ag: Sb 2 X 3 (X= S, Se) as a system to model, we demonstrate that incorporating chalcogen vacancies and Ag Sb V X complex defects into initial thin films (TFs) is crucial for activating long-range solid-state ion diffusion. Additional regulation of the Lewis acidity of auxiliary chemicals provides an exceptional conversion yield of the Ag precursor into a solid-state product up to 90%, simultaneously transforming upper matrix layers into AgSbX 2 . The proposed strategy enables tailoring radiative recombination processes, offers efficiency to invert TFs at moderate temperatures quickly, and yields structures of large areas with substantial antibacterial activity in visible light for a particular inversion system. Similar customization can be applied to most sulfides/selenides with controlled reaction yields.

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Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization

Polivtseva,

Volobujeva,

Kuznietsov

et al. 2024

ACS Appl. Mater. Interfaces

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show abstract

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Room temperature chemical transformation of SnSe to Ag₂Se nanocrystals via cation exchange

Abstract: Atomic-scale control of the chemical composition of semiconductor nanocrystals through cation exchange re-action affords greater tunability in the design of multifunctional semiconductor composite nanocrystals. Here, we report a facile route...

Cited by 1 publication

References 60 publications

Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization

Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization

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Room temperature chemical transformation of SnSe to Ag2Se nanocrystals via cation exchange

Abstract: Atomic-scale control of the chemical composition of semiconductor nanocrystals through cation exchange re-action affords greater tunability in the design of multifunctional semiconductor composite nanocrystals. Here, we report a facile route...

Cited by 1 publication

References 60 publications

Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization

Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization

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Room temperature chemical transformation of SnSe to Ag₂Se nanocrystals via cation exchange