Amino Acid Assisted Hydrothermal Synthesis of In(OH)&lt;SUB&gt;3&lt;/SUB&gt; Nanoparticles Controlled in Size and Shape

Sasaki, Takafumi; Nakaya, Masafumi; Kanie, Kiyoshi; Muramatsu, Atsushi

doi:10.2320/matertrans.m2009236

Cited by 11 publications

(8 citation statements)

References 28 publications

(42 reference statements)

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“…Recently, we have reported the size and shape control of In(OH) 3 nanoparticles by an amino-acid assisted hydrothermal method. 27 Cubic-shaped In(OH) 3 nanoparticles with the size of 50 nm were formed by addition of aspartic acid in the reaction solution. Hence, size-and shape-controlled In(OH) 3 nanoparticles have been successfully prepared; however, the further thermal treatment is inescapable to obtain ITO nanoparticles, because the In(OH) 3 phase formed in the aqueous system is rather stable even with increasing the aging temperature up to 250 C.…”

Section: Introductionmentioning

confidence: 99%

One-step solvothermal synthesis of cubic-shaped ITO nanoparticles precisely controlled in size and shape and their electrical resistivity

et al. 2010

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Section: Introductionmentioning

confidence: 99%

One-step solvothermal synthesis of cubic-shaped ITO nanoparticles precisely controlled in size and shape and their electrical resistivity

et al. 2010

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“…34,35 In our previous studies, we reported the solvothermal synthesis of ITO NPs with a cubic shape, 36,37 a narrow size distribution, 38 and protrusions on the NP surface; 39 in contrast, only indium hydroxide (In(OH) 3 ) NPs with a cubic shape were formed, and no ITO NPs were obtained when hydrothermal NP synthesis was conducted. 40 In the case of ZO, AZO, and/or GZO NPs, 41 solvothermal methods 42 in ethanol, 43−47 benzyl alcohol, 48 and methoxyethanol 47 have been reported. Regarding the application of nanoink-coating methods to prepare TCO films, the particle mean size of AZO and GZO reported in previous studies 43,44,46 was too large to prevent light scattering, thus reducing transparency in the visible light region.…”

Section: ■ Introductionmentioning

confidence: 99%

Gallium-Doped Zinc Oxide Nanoparticle Thin Films as Transparent Electrode Materials with High Conductivity

Nishi

Kasai

Suzuki

et al. 2020

ACS Appl. Nano Mater.

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Gallium-doped zinc oxide (GZO) nanoparticles (NPs) have been synthesized by a solvothermal synthesis method using gallium chloride and zinc chloride as precursors in anhydrous methanol along with bases. Systematic investigations have revealed that H2O, formed through the condensation of metal hydroxides to obtain GZO NPs, not only enhances the production of layered compounds as byproducts but also accelerates Ostwald ripening to reduce the amount of doped gallium ions. To overcome H2O generation during NP growth, we first applied sodium methoxide (NaOMe) as a base for the synthesis of GZO NPs. As a result, high-performance GZO NPs were successfully obtained in a single phase, and the mean particle size of the GZO NPs was controlled from 10 to 35 nm by changing the molar ratio of the sodium hydroxide (NaOH) and NaOMe in the reaction mixture. We further applied the obtained GZO NPs to prepare GZO NP-based transparent conductive metal oxide (TCO) films using an NP-mist deposition strategy as our developed NP-coating method on substrates. The resistivity and transparency of the deposited GZO thin films were compared with those of conventional thin films prepared by a dispersion coating method, showing that NP-mist deposition is a promising method for fabricating high-performance GZO NP-based TCO thin films on substrates under mild atmospheric conditions.

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“…Namely, we have reported the size and shape control of In(OH) 3 nanoparticles by aminoacid assisted hydrothermal method. (Sasaki et al, 2009). Cubic-shaped In(OH) 3 nanoparticles with the size of 50 nm were formed by addition of aspartic acid in the reaction solution.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Monodispersed Nanoparticles of Transparent Conductive Oxides

Muramatsu

Kanie

Sasaki

et al. 2016

KONA

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Generally, indium-tin-oxides (ITO) thin film is prepared by the sputtering process with ITO target, but only 20 % of ITO yielded from the target is deposited on the substrate. Namely, about 80 % ITO is exhausted by the deposition elsewhere far from the substrate. The recycling process of indium is limited so that ca. 20 % ITO of the starting material is lost without any recovery. Even if the recycling of ITO has been carried out in this process, we should prepare ITO target of 5 times more than apparent use of ITO on film. If we change it to printing process from the sputtering, the reduction in ITO use is expected as ca. 50 %, considering the increase in film thickness by printing. Our target technology also includes ITO nanoink for the project. As a result, monodispersed ITO nanoparticles (NPs) with a cubic shape were fabricated by using quaternary ammonium hydroxide-assisted metal hydroxide organogels. These NPs have perfect uniformity in size with beautiful shape, and perfect single crystalline structure including Sn. As we were attempted to make thin film with ITO nanoink, it was successfully fabricated below 200 nm in thickness and the resistivity was drastically decreased below 1.0 × 10-3 Ω cm after heat treatments. GZO nanoink as substitute of ITO has also been developed.

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Amino Acid Assisted Hydrothermal Synthesis of In(OH)<SUB>3</SUB> Nanoparticles Controlled in Size and Shape

Cited by 11 publications

References 28 publications

One-step solvothermal synthesis of cubic-shaped ITO nanoparticles precisely controlled in size and shape and their electrical resistivity

One-step solvothermal synthesis of cubic-shaped ITO nanoparticles precisely controlled in size and shape and their electrical resistivity

Gallium-Doped Zinc Oxide Nanoparticle Thin Films as Transparent Electrode Materials with High Conductivity

Preparation of Monodispersed Nanoparticles of Transparent Conductive Oxides

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