1. Wide Range Morphological Transition of Silver Nanoprisms by Selective Interaction with As(III): Tuning–Detuning of Surface Plasmon Offers To Decode the Mechanism
- Author
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Maireyee Bhattacharya, Subrata Mondal, Uttam Pal, Biswarup Satpati, Sudeshna Das Chakraborty, Dulal Senapati, Sandip Kumar De, and Sarmistha Ray
- Subjects
Materials science ,Surface plasmon ,Stacking ,Nanoparticle ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,symbols.namesake ,General Energy ,Transmission electron microscopy ,Chemical physics ,Atom ,symbols ,Zeta potential ,Density functional theory ,Physical and Theoretical Chemistry ,0210 nano-technology ,Raman scattering - Abstract
Polyvinylpyrrolidone (PVP)-based silver nanoprisms (AgNPrs) show an initial stacking geometry because of their low zeta potential and electrostatic interaction between face-to-face energetically stable {111} surface-bound pyrrolidone groups through the Na+-ion-induced cation−π interaction. Congested interplanar space between AgNPrs allows As(III) to react differentially with silver atoms from facial {111} and peripheral {110} facets to result in smaller stackings and finally nanoseeds. Above this critical concentration of As(III), PVP leached out from nanoparticles to form nanoseed-engulfed emulsions and induced controlled aggregation. This entire morphological transition has been decoded by recording their surface plasmon and surface-enhanced Raman scattering tuning and confirmed by the transmission electron microscopy study. Strong affinity and selectivity of As(III) toward the Ag atom (verified and estimated by the HF/3-21g* level of density functional theory calculation) coupled with low-cost colorime...
- Published
- 2019
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