scholarly journals Facile Fabrication of Single-Walled Carbon Nanotube/Anatase Composite Thin Film on Quartz Glass Substrate for Translucent Conductive Photoelectrode

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3352
Author(s):  
Yutaka Suwazono ◽  
Takuro Murayoshi ◽  
Hiroki Nagai ◽  
Mitsunobu Sato
Keyword(s):  
Thin Film ◽  
Carbon Nanotube ◽  
Quartz Glass ◽  
Glass Substrate ◽  
Composite Thin Film ◽  
Precursor Film ◽  
Quartz Glass Substrate ◽  
Single Walled Carbon Nanotube ◽  
X Ray ◽  
Single Walled Carbon

A single-walled carbon nanotube/anatase (SWCNT/anatase) composite thin film with a transmittance of over 70% in the visible-light region was fabricated on a quartz glass substrate by heat treating a precursor film at 500 °C in air. The precursor film was formed by spin coating a mixed solution of the titania molecular precursor and well-dispersed SWCNTs (0.075 mass%) in ethanol. The anatase crystals and Ti3+ ions in the composite thin films were determined by X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The effect of the heating process on the SWCNTs was analyzed using Raman spectroscopy. The composite film showed an even surface with a scratch resistance of 4H pencil hardness, as observed using field-emission scanning electron microscopy and atomic force microscopy. The electrical resistivity and optical bandgap energy of the composite thin film with a thickness of 100 nm were 6.6 × 10−2 Ω cm and 3.4 eV, respectively, when the SWCNT content in the composite thin film was 2.9 mass%. An anodic photocurrent density of 4.2 μA cm−2 was observed under ultraviolet light irradiation (16 mW cm−2 at 365 nm) onto the composite thin film, thus showing excellent properties as a photoelectrode without conductive substrates.

Single-walled carbon nanotube network/poly composite thin film for flow sensor

2010 ◽  
Vol 16 (6) ◽  
pp. 955-959 ◽  
Author(s):  
Hui Cao ◽  
Zhiyin Gan ◽  
Qiang Lv ◽  
Han Yan ◽  
Xiaobin Luo ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Nanotube ◽  
Composite Thin Film ◽  
Flow Sensor ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Network

Selective formation of cubic or tetragonal zirconia thin films of transparent, with no use of metal ion stabilizer by heating molecular precursor films under mild conditions

2021 ◽  
Vol 14 (02) ◽  
pp. 2151012
Author(s):  
Natangue Heita Shafudah ◽  
Hiroki Nagai ◽  
Mitsunobu Sato
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Quartz Glass ◽  
Glass Substrate ◽  
Metal Ion ◽  
Tetragonal Zirconia ◽  
Precursor Film ◽  
Quartz Glass Substrate ◽  
Molecular Precursor ◽  
Zirconia Thin Film

Cubic or tetragonal zirconia thin films of transparent and 100 nm thickness were selectively formed on a quartz glass substrate by heat-treating the molecular precursor films involving Zr(IV) complexes of nitrilotriacetic acid, at 500[Formula: see text]C in air for 1 h. A precursor solution was prepared by a reaction of the ligand and zirconium tetrabutoxide in alcohol under the presence of butylamine. By the addition of H2O2 or H2O into the solution, the spin-coated precursor films were converted to cubic zirconia thin films by the abovementioned procedure. Further, the identical phase was produced also in the case of the electro-sprayed precursor film which was formed by an addition of H2O2 into the solution. On the other hand, the tetragonal zirconia thin film was obtained from a precursor film formed by using a solution dissolving the original Zr(IV) complex of the ligand, without H2O2 nor H2O. The crystal structure of all thin films was determined by using both the X-ray diffraction (XRD) patterns and Raman spectra. Thus, the zirconia thin films of both crystals could be facilely and selectively obtained with no use of hetero-metal ion stabilizers. The XPS spectra of the thin films show that the O/Zr ratio of the cubic phase is 1.37 and slightly larger than tetragonal one (1.29), and also demonstrate that the nitrogen atoms, which may contribute to stabilize these metastable phases at room temperature, of about 5−7 atomic% was remained in the resultant thin films. The adhesion strengths of cubic zirconia thin film onto the quartz glass substrate was 68 MPa and larger than that of tetragonal one, when the precursor films were formed via a spin coating process. The optical and surface properties of the thin films were also examined in relation to the crystal systems.

scholarly journals Hydrophilic Titania Thin Films from a Molecular Precursor Film Formed via Electrospray Deposition on a Quartz Glass Substrate Precoated with Carbon Nanotubes

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1050
Author(s):  
Natangue Heita Shafudah ◽  
Hiroki Nagai ◽  
Yutaka Suwazono ◽  
Ryuhei Ozawa ◽  
Yukihiro Kudoh ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Contact Angle ◽  
Water Contact Angle ◽  
Quartz Glass ◽  
Glass Substrate ◽  
Quartz Glass Substrate ◽  
Electrospray Deposition ◽  
Water Contact ◽  
X Ray

Titania precursor films were electrosprayed on a quartz glass substrate, which was pre-modified with an ultra-thin film obtained by spin-coating a single-walled carbon nanotube (SWCNT) dispersed solution. The X-ray diffraction patterns of the thin films obtained by heat-treating the precursor films at 500 °C in air for 1 h indicated that the formed crystals were anatase. A new route to fabricate transparent thin films on the insulating substrate via electrospray deposition (ESD) was thus attained. The photoluminescence spectrum of the thin film showed a peak at 2.23 eV, assignable to the self-trapped exciton of anatase. The Raman spectrum of the thin film demonstrated that heat treatment is useful for removing SWCNTs. The thin film showed a water contact angle of 14 ± 2° even after being kept under dark conditions for 1 h, indicating a high level of hydrophilicity. Additionally, the thin film had a super-hydrophilic surface with a water contact angle of 1 ± 1° after ultraviolet light irradiation with an intensity of 4.5 mW cm−2 at 365 nm for 1 h. The importance of Ti3+ ions in the co-present amorphous phase, which was dominantly formed via the ESD process, for hydrophilicity was also clarified by means of X-ray photoelectron spectroscopy.

scholarly journals Tuning the electrical performance and bias stability of a semiconducting SWCNT thin film transistor with an atomic layer deposited AlZrOx composite

RSC Advances ◽  
2017 ◽  
Vol 7 (83) ◽  
pp. 52517-52523 ◽  
Author(s):  
Jun Li ◽  
Chuan-Xin Huang ◽  
Jian-Hua Zhang
Keyword(s):  
Thin Film ◽  
Carbon Nanotube ◽  
Thin Film Transistors ◽  
Thin Film Transistor ◽  
Atomic Layer ◽  
Electrical Performance ◽  
Solution Processed ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Bias Stability

Solution-processed semiconducting single-walled carbon nanotube (s-SWCNT) thin film transistors (TFTs) based on different atomic layer deposited AlZrOx insulators are fabricated and characterized.

Synthesis and Characterization of Zn Oxide Hexagonal Nano-Pole Films on Quartz Glass Substrate

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Jie Chen ◽  
Jun Wang
Keyword(s):  
Growth Mechanism ◽  
Quartz Glass ◽  
Photoelectron Spectroscopy ◽  
Glass Substrate ◽  
Sol Gel ◽  
Layer Growth ◽  
Layer By Layer ◽  
Quartz Glass Substrate ◽  
Wurtzite Phase ◽  
X Ray

Hexagon-shaped Zn oxide nano-pole films with terraces and steps have been successfully fabricated by means of a combined approach involving sol-gel process, high-temperature heat treatment, and the hydrothermal method. The surface chemistry and morphological features of the films were characterized by means of x-ray photoelectron spectroscopy and scanning electron microcopy. All the diffraction peaks in x-ray diffraction pattern match with those of the hexagonal wurtzite phase of Zn oxide. Transmittance measurements show that the optical transmittance of the sample synthesized at 520°C on quartz glass substrate is the highest, reaching about 65% in the visible-light region. Based on the detailed structural characterization and the nucleation-growth kinetics, we find that the whole crystallization process of wurtzite Zn oxide nano-poles includes nanocatalysis and layer-by-layer growth mechanism. The present study provides an important understanding of the growth mechanism for nano-pole synthesis of Zn oxide and related materials.

Single-Walled Carbon Nanotube Thin Film Transistor Fabricated Using Solution Prepared with 9,9-Dioctyfluorenyl-2,7-diyl–Bipyridine Copolymer

2011 ◽  
Vol 50 (7) ◽  
pp. 070207 ◽  
Author(s):  
Xun Yi ◽  
Hiroaki Ozawa ◽  
Gou Nakagawa ◽  
Tsuyohiko Fujigaya ◽  
Naotoshi Nakashima ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Nanotube ◽  
Thin Film Transistor ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon
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