Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 2, Pages 2779-2786Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c04462
Keywords
silicon nanowires; metal-assisted chemical etching; metal etchant; metal reformation; horizontal crack
Funding
- National Natural Science Foundation of China [51972031]
- Beijing Natural Science Foundation [2172030]
- Beijing Normal University
Ask authors/readers for more resources
This study reveals the relationship between the oxidative dissolution of silver in hot water and the crack formation in metal-assisted etched silicon nanowire arrays. A general strategy for rapidly generating cracked silicon nanowire array membranes is proposed. The rapid metal dissolution by wet metal etchants shortens the soaking process to 1 minute or less.
Horizontal cracks in the metal-assisted etched SiNW array membrane significantly facilitate the uniform transfer of silicon nanowire (SiNW) array onto foreign substrates. Herein, for the first time, we elucidate that the oxidative dissolution of silver by dissolved oxygen in hot water is essential to trigger crack formation in silver-assisted etched SiNW array and devise a general strategy for rapidly generating horizontal cracks in metal-assisted etched silicon nanowire array membranes by metal etchants, enabling rapid metal dissolution, spontaneous metal reformation, and subsequent metal-assisted etching of silicon. The rapid metal dissolution by wet metal etchants enables the soaking process to be reduced to 1 min or less at room temperature. We anticipate that the present work provides a scientific guidance to prepare a cracked SiNW array membrane in terms of simplicity and scalability and paves the way for mass production of SiNW-based flexible devices such as solar cells, sensors, and batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available