Tunable surface plasmon resonance frequencies of monodisperse indium tin oxide nanoparticles by controlling composition, size, and morphology

Abstract

Monodisperse indium tin oxide nanoparticles (ITO NPs) with high crystallinity have been synthesized by the rapid thermal injection method and the seed-mediated growth method. We demonstrate that the surface plasmon resonance (SPR) frequencies of ITO NPs can be manipulated from 1,600 to 1,993 nm in near-infrared band by controlling the composition, size, and morphology. The doping Sn concentration in ITO NPs could be controlled via changing the %Sn in the initial feed from 0% to 30%. The shortest SPR wavelength at 1,600 nm with 10% Sn doping concentration indicates highest free electron carrier concentration in ITO NPs, which has direct relationship with doping Sn4+ ions. Furthermore, we demonstrate that the SPR peaks can also be tuned by the size of ITO NPs in the case of uniform doping. Besides, compared with the ITO NPs, single crystalline ITO with nanoflower morphology synthesized through the one-pot method exhibit SPR absorption peak features of red-shifting and broadening.

Laser sintering of gravure printed indium tin oxide films on polyethylene terephthalate for flexible electronics

“…Whilst the shift was expected due to the increasing conductivity, the appearance of a resonant feature is tentatively attributed to changes in plasmon resonance of the nanoparticle-based ITO film. One should mention that the position of said resonance depends on several factors including the refractive index of surrounding medium, chemical composition, and morphology of the nanoparticles in the film 49,50 . The possibility that the particle morphology has changed (i.e.…”

One‐step Microwave‐assisted Synthesis of Indium Tin Oxide Nanoparticles for NIR‐Selective Dynamic Window Applications

“…Among all the studied metal oxides, ITO NPs have recently gained the most interest, owing to their combination of high conductivity and excellent LSPR properties . In general, the ITO colloidal NPs were prepared using a hot‐injection approach or solvothermal reactions, which often require vacuum or inert gas protection.…”

“…In general, the ITO colloidal NPs were prepared using a hot‐injection approach or solvothermal reactions, which often require vacuum or inert gas protection. The whole process is difficult to control and may takes several hours to obtain the desirable NPs ,. Here, we introduce a rapid, clean, inexpensive, and versatile technique, known as microwave‐assisted synthesis, to fabricate NPs.…”

Plasmonic Substrates Do Not Promote Vibrational Energy Transfer at Solid–Liquid Interfaces

“…Between the two extreme cases, Indium-Tin-Oxide (ITO) is chosen as a material exhibiting electrical conductivity 50 and a high mobility of electrons, which has been reported to facilitate weak plasmonic properties. [51][52][53] For our particular sample preparation, we have measured an enhancement factor of about EF=2 ( Fig. SI 1 (c) and (d)).…”