TY - JOUR
T1 - Anisotropic Plasmon Resonance in Ti3C2Tx MXene Enables Site-Selective Plasmonic Catalysis
AU - Wu, Zhiyi
AU - Shen, Jiahui
AU - Li, Zimu
AU - Liu, Shuang
AU - Zhou, Yuxuan
AU - Feng, Kai
AU - Zhang, Binbin
AU - Zhao, Shiqi
AU - Xue, Di
AU - He, Jiari
AU - Yu, Kewei
AU - Zhang, Jinpan
AU - Dawson, Graham
AU - Zhang, Qingfeng
AU - Huang, Lizhen
AU - Li, Chaoran
AU - An, Xingda
AU - Chi, Lifeng
AU - Zhang, Xiaohong
AU - He, Le
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/1/14
Y1 - 2025/1/14
N2 - The ever-growing interest in MXenes has been driven by their distinct electrical, thermal, mechanical, and optical properties. In this context, further revealing their physicochemical attributes remains the key frontier of MXene materials. Herein, we report the anisotropic localized surface plasmon resonance (LSPR) features in Ti3C2Tx MXene as well as site-selective photocatalysis enabled by the photophysical anisotropy. Both experimental and theoretical studies provide direct evidence of the occurrence of transverse and longitudinal dipolar plasmon resonance modes, respectively, driven by in-plane and out-of-plane vibrations of the two-dimensional (2D) MXene nanoflakes. Wavelength-controlled excitation of the two LSPR modes is demonstrated to activate either the on-edge or the in-plane active sites for plasmonic charge carrier-induced site-selective catalysis. Our findings uncover the presence as well as the mechanism of the anisotropic plasmon resonance in nonmetallic 2D nanomaterials and provide intriguing design principles for next-generation plasmonic nanocatalysts.
AB - The ever-growing interest in MXenes has been driven by their distinct electrical, thermal, mechanical, and optical properties. In this context, further revealing their physicochemical attributes remains the key frontier of MXene materials. Herein, we report the anisotropic localized surface plasmon resonance (LSPR) features in Ti3C2Tx MXene as well as site-selective photocatalysis enabled by the photophysical anisotropy. Both experimental and theoretical studies provide direct evidence of the occurrence of transverse and longitudinal dipolar plasmon resonance modes, respectively, driven by in-plane and out-of-plane vibrations of the two-dimensional (2D) MXene nanoflakes. Wavelength-controlled excitation of the two LSPR modes is demonstrated to activate either the on-edge or the in-plane active sites for plasmonic charge carrier-induced site-selective catalysis. Our findings uncover the presence as well as the mechanism of the anisotropic plasmon resonance in nonmetallic 2D nanomaterials and provide intriguing design principles for next-generation plasmonic nanocatalysts.
KW - anisotropy
KW - localized surface plasmon resonance (LSPR)
KW - MXene
KW - plasmonic charge carriers
KW - plasmonic photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85215396887&partnerID=8YFLogxK
U2 - 10.1021/acsnano.4c17316
DO - 10.1021/acsnano.4c17316
M3 - Article
C2 - 39754595
AN - SCOPUS:85215396887
SN - 1936-0851
VL - 19
SP - 1832
EP - 1844
JO - ACS Nano
JF - ACS Nano
IS - 1
ER -