BROWSE

Related Scientist

CINAP's photo.

CINAP
나노구조물리 연구단
more info

ITEM VIEW & DOWNLOAD

Non-oxidized bare copper nanoparticles with surface excess electrons in air

Cited 0 time in webofscience Cited 0 time in scopus
144 Viewed 0 Downloaded
Title
Non-oxidized bare copper nanoparticles with surface excess electrons in air
Author(s)
Chung, Kyungwha; Bang, Joonho; Athira Thacharon; Hyun Yong Song; Se Hwang Kang; Jang, Woo-Sung; Neha Dhull; Thapa, Dinesh; Ajmal, C. Muhammed; Song, Bumsub; Sung-Gyu Lee; Zhen Wang; Jetybayeva, Albina; Hong, Seungbum; Lee, Kyu Hyoung; Cho, Eun Jin; Baik, Seunghyun; Sang Ho Oh; Young-Min Kim; Young Hee Lee; Kim, Seong-Gon; Sung Wng Kim
Publication Date
2022-03
Journal
Nature Nanotechnology, v.17, no.3, pp.285 - 291
Publisher
Nature Research
Abstract
© 2022 Springer Nature Limited. Copper (Cu) nanoparticles (NPs) have received extensive interest owing to their advantageous properties compared with their bulk counterparts. Although the natural oxidation of Cu NPs can be alleviated by passivating the surfaces with additional moieties, obtaining non-oxidized bare Cu NPs in air remains challenging. Here we report that bare Cu NPs with surface excess electrons retain their non-oxidized state over several months in ambient air. Cu NPs grown on an electride support with excellent electron transfer ability are encapsulated by the surface-accumulated excess electrons, exhibiting an ultralow work function of ~3.2 eV. Atomic-scale structural and chemical analyses confirm the absence of Cu oxide moiety at the outermost surface of air-exposed bare Cu NPs. Theoretical energetics clarify that the surface-accumulated excess electrons suppress the oxygen adsorption and consequently prohibit the infiltration of oxygen into the Cu lattice, provoking the endothermic reaction for oxidation process. Our results will further stimulate the practical use of metal NPs in versatile applications.
URI
https://pr.ibs.re.kr/handle/8788114/11598
DOI
10.1038/s41565-021-01070-4
ISSN
1748-3387
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse