Unique three-dimensional nano-/micro-textured surfaces consisting of highly crystalline Nb2O5 nanotubes

Sayaka Suzuki, Katsuya Teshima, Takahiro Ishizaki, Sunhyung Lee, Kunio Yubuta, Toetsu Shishido, Shuji Oishi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Three-dimensional (3-D) Nb2O5 nanotube layers with honeycomb structures were successfully synthesized using polystyrene (PS) microsphere templates and NbOx nanocrystals. A densely packed monolayer of monodisperse PS microspheres was deposited onto a silica glass substrate using the LangmuirBlodgett film technique. NbOx nanocrystals were prepared via proton-exchange and exfoliation processes of highly crystalline, layered K4Nb6O17 crystals obtained by flux-growth. The 3-D crystal layers were fabricated by coating the pastes containing NbOx nanosheets onto the PS microsphere templates, followed by a heating treatment in an electric furnace. During the heating process, the PS microsphere templates were thermally decomposed, and the NbOx nanosheets were transformed into Nb2O5 nanotubes. As a result, transparent/colorless, nano-/micro-textured surfaces were formed on the silica glass substrates. The surface structure clearly varied depending on the nanosheet concentration of the pastes. The rough, solid surfaces modified with fluoroalkylsilane were found to be highly hydrophobic (water contact angle=148°). The 3-D nano-/micro-textures of the Nb 2O5-layered surfaces enhanced their hydrophobicity. The highly hydrophobic surfaces were converted to ultrahydrophilic surfaces by photocatalytic oxidation using Nb2O5 nanotube layers.

Original languageEnglish
Pages (from-to)1095-1100
Number of pages6
JournalJournal of Crystal Growth
Volume318
Issue number1
DOIs
Publication statusPublished - 2011 Mar 1
Externally publishedYes

Fingerprint

Nanotubes
Polystyrenes
nanotubes
Microspheres
Nanosheets
Crystalline materials
polystyrene
templates
silica glass
Fused silica
Ointments
Nanocrystals
nanocrystals
electric furnaces
Honeycomb structures
honeycomb structures
Electric furnaces
Crystals
heating
Industrial heating

Keywords

  • A1. Nanostructure
  • A2. Growth from high temperature solution
  • B1. Nanomaterials
  • B1. Niobates
  • B2. Semiconducting materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Chemistry
  • Inorganic Chemistry

Cite this

Unique three-dimensional nano-/micro-textured surfaces consisting of highly crystalline Nb2O5 nanotubes. / Suzuki, Sayaka; Teshima, Katsuya; Ishizaki, Takahiro; Lee, Sunhyung; Yubuta, Kunio; Shishido, Toetsu; Oishi, Shuji.

In: Journal of Crystal Growth, Vol. 318, No. 1, 01.03.2011, p. 1095-1100.

Research output: Contribution to journalArticle

Suzuki, Sayaka ; Teshima, Katsuya ; Ishizaki, Takahiro ; Lee, Sunhyung ; Yubuta, Kunio ; Shishido, Toetsu ; Oishi, Shuji. / Unique three-dimensional nano-/micro-textured surfaces consisting of highly crystalline Nb2O5 nanotubes. In: Journal of Crystal Growth. 2011 ; Vol. 318, No. 1. pp. 1095-1100.
@article{57c83d8b02f34beba1fb73cbd6607e65,
title = "Unique three-dimensional nano-/micro-textured surfaces consisting of highly crystalline Nb2O5 nanotubes",
abstract = "Three-dimensional (3-D) Nb2O5 nanotube layers with honeycomb structures were successfully synthesized using polystyrene (PS) microsphere templates and NbOx nanocrystals. A densely packed monolayer of monodisperse PS microspheres was deposited onto a silica glass substrate using the LangmuirBlodgett film technique. NbOx nanocrystals were prepared via proton-exchange and exfoliation processes of highly crystalline, layered K4Nb6O17 crystals obtained by flux-growth. The 3-D crystal layers were fabricated by coating the pastes containing NbOx nanosheets onto the PS microsphere templates, followed by a heating treatment in an electric furnace. During the heating process, the PS microsphere templates were thermally decomposed, and the NbOx nanosheets were transformed into Nb2O5 nanotubes. As a result, transparent/colorless, nano-/micro-textured surfaces were formed on the silica glass substrates. The surface structure clearly varied depending on the nanosheet concentration of the pastes. The rough, solid surfaces modified with fluoroalkylsilane were found to be highly hydrophobic (water contact angle=148°). The 3-D nano-/micro-textures of the Nb 2O5-layered surfaces enhanced their hydrophobicity. The highly hydrophobic surfaces were converted to ultrahydrophilic surfaces by photocatalytic oxidation using Nb2O5 nanotube layers.",
keywords = "A1. Nanostructure, A2. Growth from high temperature solution, B1. Nanomaterials, B1. Niobates, B2. Semiconducting materials",
author = "Sayaka Suzuki and Katsuya Teshima and Takahiro Ishizaki and Sunhyung Lee and Kunio Yubuta and Toetsu Shishido and Shuji Oishi",
year = "2011",
month = "3",
day = "1",
doi = "10.1016/j.jcrysgro.2010.11.129",
language = "English",
volume = "318",
pages = "1095--1100",
journal = "Journal of Crystal Growth",
issn = "0022-0248",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Unique three-dimensional nano-/micro-textured surfaces consisting of highly crystalline Nb2O5 nanotubes

AU - Suzuki, Sayaka

AU - Teshima, Katsuya

AU - Ishizaki, Takahiro

AU - Lee, Sunhyung

AU - Yubuta, Kunio

AU - Shishido, Toetsu

AU - Oishi, Shuji

PY - 2011/3/1

Y1 - 2011/3/1

N2 - Three-dimensional (3-D) Nb2O5 nanotube layers with honeycomb structures were successfully synthesized using polystyrene (PS) microsphere templates and NbOx nanocrystals. A densely packed monolayer of monodisperse PS microspheres was deposited onto a silica glass substrate using the LangmuirBlodgett film technique. NbOx nanocrystals were prepared via proton-exchange and exfoliation processes of highly crystalline, layered K4Nb6O17 crystals obtained by flux-growth. The 3-D crystal layers were fabricated by coating the pastes containing NbOx nanosheets onto the PS microsphere templates, followed by a heating treatment in an electric furnace. During the heating process, the PS microsphere templates were thermally decomposed, and the NbOx nanosheets were transformed into Nb2O5 nanotubes. As a result, transparent/colorless, nano-/micro-textured surfaces were formed on the silica glass substrates. The surface structure clearly varied depending on the nanosheet concentration of the pastes. The rough, solid surfaces modified with fluoroalkylsilane were found to be highly hydrophobic (water contact angle=148°). The 3-D nano-/micro-textures of the Nb 2O5-layered surfaces enhanced their hydrophobicity. The highly hydrophobic surfaces were converted to ultrahydrophilic surfaces by photocatalytic oxidation using Nb2O5 nanotube layers.

AB - Three-dimensional (3-D) Nb2O5 nanotube layers with honeycomb structures were successfully synthesized using polystyrene (PS) microsphere templates and NbOx nanocrystals. A densely packed monolayer of monodisperse PS microspheres was deposited onto a silica glass substrate using the LangmuirBlodgett film technique. NbOx nanocrystals were prepared via proton-exchange and exfoliation processes of highly crystalline, layered K4Nb6O17 crystals obtained by flux-growth. The 3-D crystal layers were fabricated by coating the pastes containing NbOx nanosheets onto the PS microsphere templates, followed by a heating treatment in an electric furnace. During the heating process, the PS microsphere templates were thermally decomposed, and the NbOx nanosheets were transformed into Nb2O5 nanotubes. As a result, transparent/colorless, nano-/micro-textured surfaces were formed on the silica glass substrates. The surface structure clearly varied depending on the nanosheet concentration of the pastes. The rough, solid surfaces modified with fluoroalkylsilane were found to be highly hydrophobic (water contact angle=148°). The 3-D nano-/micro-textures of the Nb 2O5-layered surfaces enhanced their hydrophobicity. The highly hydrophobic surfaces were converted to ultrahydrophilic surfaces by photocatalytic oxidation using Nb2O5 nanotube layers.

KW - A1. Nanostructure

KW - A2. Growth from high temperature solution

KW - B1. Nanomaterials

KW - B1. Niobates

KW - B2. Semiconducting materials

UR - http://www.scopus.com/inward/record.url?scp=79952739830&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952739830&partnerID=8YFLogxK

U2 - 10.1016/j.jcrysgro.2010.11.129

DO - 10.1016/j.jcrysgro.2010.11.129

M3 - Article

AN - SCOPUS:79952739830

VL - 318

SP - 1095

EP - 1100

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

SN - 0022-0248

IS - 1

ER -