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

Sasaki, Takafumi; Endo, Yumi; Nakaya, Masafumi; Kanie, Kiyoshi; Nagatomi, Akira; Tanoue, Koji; Nakamura, Ryoichi; Muramatsu, Atsushi

doi:10.1039/c0jm01338b

Cited by 58 publications

(57 citation statements)

References 33 publications

(26 reference statements)

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“…It is well known that the addition of capping agent during synthetic reaction would simultaneously influence nanocrystal growth. 17 The phase transformation of metal hydroxide precursors have been investigated extensively and used for preparation of metal oxide nanocrystals including TiO 2 28 , ITO 10 dissolution-recrystallization mechanism 29 : the rhombohedral InOOH decompose and dissolve in the solution, followed by the nucleation and growth of cubic structure In 2 O 3 (here is ITO). Based on the theory proposed by LaMer and co-workers 33 , higher concentration dissolution of metal species is beneficial for formation of more nuclei, resulting in smaller nanocrystals.…”

Section: Resultsmentioning

confidence: 99%

Ethanolamine-assisted synthesis of size-controlled indium tin oxide nanoinks for low temperature solution deposited transparent conductive films

et al. 2015

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Highly conductive indium tin oxide (ITO) nanocrystals and inks have been synthesized by solvothermal dehydration condensation of metal hydroxide in combination with in-situ ethanolamine capping. It is found that the addition of ethanolamine can effectively reduce the size of nanocrystals and chemically modify their surfaces. The synthesized ITO nanocrystals can be well dispersed in ethanol with high solid content and the suspension is stable for days. Such small-molecule capped ITO suspension has been used as a conductive ink to make transparent conductive films by spin coating. Furthermore, a water washing step has been introduced in the ITO film preparation process to improve its conductivity, resulting in low resistivity of 8.9×10 -3 Ω•cm after 2 hours annealing at 300 o C in mixed Ar and H 2 atmosphere.Graphical Abstract ITO ink are synthesised by addition of different concentration ethanolamine in reaction. A water washing step has been introduced in the ITO film preparation process to improve its conductivity, resulting in low resistivity high-quality films.

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Section: Resultsmentioning

confidence: 99%

Ethanolamine-assisted synthesis of size-controlled indium tin oxide nanoinks for low temperature solution deposited transparent conductive films

et al. 2015

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“…From cubic particles with exclusively [100] surfaces to octahedra with [111] surfaces, different morphologies have been achieved successfully. Large interest exists also in the shape control of other oxidic materials, in particular those with special magnetic, electrochemical, or catalytic properties such as spinels M II O·Fe 2 O 3 (M = Fe, Co, Ni, Mn),125 Mn 3 O 4 ,126 MnO 2 ,127 MnO,128 SnO 2 ,129 In 2 O 3 ,130 Ag 2 O,131 V 2 O 5 ,132 or MgO 133. The previous considerations can be transferred to many more systems 134…”

Section: Nanocrystals With Anisotropic Shape: Synthesismentioning

confidence: 99%

Shape Matters: Anisotropy of the Morphology of Inorganic Colloidal Particles – Synthesis and Function

Polarz

2011

Adv Funct Materials

110

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The shape of a crystalline particle can be defi ned by a characteristic set and abundance of surfaces corresponding to the lattice planes [ hkl ] of the crystal. The structure, the density, the electronic system, and the energy of each [ hkl ]-surface is different from the others. Consequently, every morphology is also characterized by a unique free energy compared to alternative shapes at a constant surface-to-volume ratio. Using tools from geometrical crystallography, an attempt is made to describe the systems in terms of morphology energy landscapes. It is obvious that, similar to surface phenomena, shaperelated properties are also apparent, in particular at the nanometer-scale. However, morphology effects go much beyond surface effects. It will be shown that not only catalytic properties differ with particle shape, but also magnetic, optical, electronic, mechanical, and self-assembly properties are infl uenced. In addition, analytical methods are highlighted that are suitable for the determination of the shape of the particles. Different methods are discussed that can be found for the synthesis of anisotropic metal and metal-oxide nanoparticles.

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“…Thus, by introducing pre-prepared ITO particles with a specific giant size, it is possible to obtain films with mesopores of the same scale. Moreover, several articles have reported that it is feasible to control the grain size and shape of the nanoparticles [14][15][16] , by which the size of the mesopores can be arbitrary regulated by adjusting the grain size.…”

Section: Resultsmentioning

confidence: 99%

“…Synthesis of indium tin oxide nanoparticles. The nanoparticles were prepared by a solvothermal reaction in ethylene glycol (EG) according to the literature 14 . Typically, the indium chloride tetrahydrate (InCl 3 ·4H 2 O, 99.99%, Sinopharm Chemical Reagent Co., Ltd) and the tin chloride pentahydrate (SnCl 4 ·5H 2 O, 99%, Sinopharm Chemical Reagent Co., Ltd) were dissolved in EG and kept the concentration of In 3+ and Sn 5+ 0.5 mol/L and 0.05 mol/L respectively.…”

Section: Methodsmentioning

confidence: 99%

A Combined Experimental and Theoretical Study of Screen-printing High Transparent Conductive Mesoscopic ITO Films

Qiao

Lü

Han

et al. 2020

Sci Rep

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We have successfully fabricated transparent conductive mesoporous indium tin oxide (TCM-ITO) films by a screen-printing method. The TCM-ITO films possess approximately 22 nm mesopores and obtain electrical conductivity up to 14.96 S/cm by adjusting the mass ratio of cubic-shaped ITO nanoparticles to ethyl cellulose (ec) and precisely controlling the annealing process. the regulation mechanism of ec and the heat-induced recrystallization process of ito nanoparticles are elaborated. the internal kinetic processes of the films based on different surface states are analysed, and an extensible impedance model is established.Transparent conducting oxides (TCOs) have been studied sufficiently in recent decades. Indium tin oxide (ITO) is widely used owing to its relatively high transparency, excellent conductivity, and suitable work function 1 . TCO films with mesoscopic structures have raised much attention in optoelectronics displays 2-4 , solar cells 5,6 and sensors 7 . The combination between mesoscopic TCO and other photosensitive species can promote the separation of electrons and holes in the photosensitive materials, reduce the resistance during transmission, and effectively collect photoelectrons 8,9 . As an excellent TCO material, ITO films with mesoporous framework have raised significant attention because such a scaffold allows functionalization to obtain excellent device performance with electrochemical and photoelectrical active species 5,10 . Methods of controllable ITO mesoporous films have been realized by the sol-gel process 11 , but it yields amorphous pore walls and restricts the range of application on other mesoporous metal oxide substrates. Zhang et al. 12 obtained the precursor solution with mixing tin chloride, indium chloride, and CTAB in ethanol, and deposited mesoporous ITO films on the quartz plates by dip coating. However, the flat substrate and the fluidity of the solution limit its range of application. At the same time, Michael gross et al. 13 researched the mesoporous ITO films made by doctor blading ethanolic nanoparticles ITO dispersion. However, doctor blade method has some uncertainty and could not achieve precise control of film thickness. In view of that, a new method is needed to accurately prepare mesoporous films. Screen printing method, as a widely used method in fabricating films, could precisely control the thickness of the experimental film by adjusting various parameters. Whereas few efforts have been devoted to the systematic investigation of ITO mesoporous films manufactured by the screen printing method.Hence, we proposed a series of strategies to fabricate robust ITO mesoporous films that have high conductivity and transmittance by using a paste consisting of pre-prepared ITO nanoparticles and the screen-printing technique, and that have mesopores of approximately 22 nm, electrical conductivity up to 7.6 S/cm, and average transmittance about 90% at 500 °C. The properties of mesoporous ITO films produced by different methods are listed in Table S1. Moreover, we have elab...

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

Cited by 58 publications

References 33 publications

Ethanolamine-assisted synthesis of size-controlled indium tin oxide nanoinks for low temperature solution deposited transparent conductive films

Ethanolamine-assisted synthesis of size-controlled indium tin oxide nanoinks for low temperature solution deposited transparent conductive films

Shape Matters: Anisotropy of the Morphology of Inorganic Colloidal Particles – Synthesis and Function

A Combined Experimental and Theoretical Study of Screen-printing High Transparent Conductive Mesoscopic ITO Films

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