TY - JOUR
T1 - Surface Plasmon Resonance Modulation by Complexation of Platinum on the Surface of Silver Nanocubes
AU - Huri, Avi
AU - Mandelbaum, Yaakov
AU - Rozenberg, Mike
AU - Muzikansky, Anya
AU - Zysler, Melina
AU - Zitoun, David
N1 - Publisher Copyright:
© 2024 The Authors. Published by American Chemical Society
PY - 2024/8/20
Y1 - 2024/8/20
N2 - The use of plasmonic particles, specifically, localized surface plasmonic resonance (LSPR), may lead to a significant improvement in the electrical, electrochemical, and optical properties of materials. Chemical modification of the dielectric constant near the plasmonic surface should lead to a shift of the optical resonance and, therefore, the basis for color tuning and sensing. In this research, we investigated the variation of the LSPR by modifying the chemical environment of Ag nanoparticles (NPs) through the complexation of Pt(IV) metal cations near the plasmonic surface. This study is carried out by measuring the shift of the plasmon dipole resonance of Ag nanocubes (NCs) and nanowires (NWs) of differing sizes upon coating the Ag surface with a layer of polydopamine (PDA) as a coordinating matrix for Pt(IV) complexes. The red shift of up to 45 nm depends linearly on the thickness of the PDA/Pt(IV) layer and the Pt(IV) content. Additionally, we calculated the dielectric constant of the surrounding medium using a numerical method.
AB - The use of plasmonic particles, specifically, localized surface plasmonic resonance (LSPR), may lead to a significant improvement in the electrical, electrochemical, and optical properties of materials. Chemical modification of the dielectric constant near the plasmonic surface should lead to a shift of the optical resonance and, therefore, the basis for color tuning and sensing. In this research, we investigated the variation of the LSPR by modifying the chemical environment of Ag nanoparticles (NPs) through the complexation of Pt(IV) metal cations near the plasmonic surface. This study is carried out by measuring the shift of the plasmon dipole resonance of Ag nanocubes (NCs) and nanowires (NWs) of differing sizes upon coating the Ag surface with a layer of polydopamine (PDA) as a coordinating matrix for Pt(IV) complexes. The red shift of up to 45 nm depends linearly on the thickness of the PDA/Pt(IV) layer and the Pt(IV) content. Additionally, we calculated the dielectric constant of the surrounding medium using a numerical method.
UR - http://www.scopus.com/inward/record.url?scp=85200596882&partnerID=8YFLogxK
U2 - 10.1021/acsomega.4c02150
DO - 10.1021/acsomega.4c02150
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C2 - 39184479
AN - SCOPUS:85200596882
SN - 2470-1343
VL - 9
SP - 35526
EP - 35536
JO - ACS Omega
JF - ACS Omega
IS - 33
ER -