Synthesis of nano-structured materials by laser-ablation and their application to sensors

T. Okada, Junya Suehiro

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We describe the synthesis of nano-structured materials of ZnO and Pd by laser ablation and their applications to sensors. The synthesis of ZnO nano-wires was performed by nano-particle assisted deposition (NPAD) where nano-crystals were grown with nano-particles generated by laser-ablating a ZnO sintered target in an Ar background gas. The synthesized ZnO nano-wires were characterized with a scanning electron microscopy and the photoluminescent characteristics were examined under an excitation with the third harmonics of a Nd:YAG laser. The nano-wires with a diameter in the range from 50 to 150 nm and a length of up to 5 μm were taken out of the substrate by laser blow-off technique and/or sonication. It was confirmed that the nano-wires showed the stimulated emission under optical pumping, indicating a high quality of the crystalinity. Pd nano-particles were generated by laser-ablating a Pd plate in pure water. The transmission electron microscope observation revealed that Pd nano-particles with a diameter in the range from 3 nm to several tens of nanometers were produced. Using these nano-structured materials, we successfully fabricated sensors by the dielectrophoresis techniques. In the case of the ultraviolet photosensor, a detection sensitivity of 10 nW/cm 2 was achieved and in the case of hydrogen sensing, the response time of less than 10 s has been demonstrated with Pd nano-particles.

Original languageEnglish
Pages (from-to)7840-7847
Number of pages8
JournalApplied Surface Science
Volume253
Issue number19
DOIs
Publication statusPublished - Jul 31 2007

Fingerprint

Laser ablation
Nanostructured materials
Wire
Lasers
Sensors
Optical pumping
Stimulated emission
Sonication
Electrophoresis
Hydrogen
Electron microscopes
Gases
Crystals
Scanning electron microscopy
Water
Substrates

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

Synthesis of nano-structured materials by laser-ablation and their application to sensors. / Okada, T.; Suehiro, Junya.

In: Applied Surface Science, Vol. 253, No. 19, 31.07.2007, p. 7840-7847.

Research output: Contribution to journalArticle

@article{9d716f768a6b421cbcbc6b211275edab,
title = "Synthesis of nano-structured materials by laser-ablation and their application to sensors",
abstract = "We describe the synthesis of nano-structured materials of ZnO and Pd by laser ablation and their applications to sensors. The synthesis of ZnO nano-wires was performed by nano-particle assisted deposition (NPAD) where nano-crystals were grown with nano-particles generated by laser-ablating a ZnO sintered target in an Ar background gas. The synthesized ZnO nano-wires were characterized with a scanning electron microscopy and the photoluminescent characteristics were examined under an excitation with the third harmonics of a Nd:YAG laser. The nano-wires with a diameter in the range from 50 to 150 nm and a length of up to 5 μm were taken out of the substrate by laser blow-off technique and/or sonication. It was confirmed that the nano-wires showed the stimulated emission under optical pumping, indicating a high quality of the crystalinity. Pd nano-particles were generated by laser-ablating a Pd plate in pure water. The transmission electron microscope observation revealed that Pd nano-particles with a diameter in the range from 3 nm to several tens of nanometers were produced. Using these nano-structured materials, we successfully fabricated sensors by the dielectrophoresis techniques. In the case of the ultraviolet photosensor, a detection sensitivity of 10 nW/cm 2 was achieved and in the case of hydrogen sensing, the response time of less than 10 s has been demonstrated with Pd nano-particles.",
author = "T. Okada and Junya Suehiro",
year = "2007",
month = "7",
day = "31",
doi = "10.1016/j.apsusc.2007.02.152",
language = "English",
volume = "253",
pages = "7840--7847",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",
number = "19",

}

TY - JOUR

T1 - Synthesis of nano-structured materials by laser-ablation and their application to sensors

AU - Okada, T.

AU - Suehiro, Junya

PY - 2007/7/31

Y1 - 2007/7/31

N2 - We describe the synthesis of nano-structured materials of ZnO and Pd by laser ablation and their applications to sensors. The synthesis of ZnO nano-wires was performed by nano-particle assisted deposition (NPAD) where nano-crystals were grown with nano-particles generated by laser-ablating a ZnO sintered target in an Ar background gas. The synthesized ZnO nano-wires were characterized with a scanning electron microscopy and the photoluminescent characteristics were examined under an excitation with the third harmonics of a Nd:YAG laser. The nano-wires with a diameter in the range from 50 to 150 nm and a length of up to 5 μm were taken out of the substrate by laser blow-off technique and/or sonication. It was confirmed that the nano-wires showed the stimulated emission under optical pumping, indicating a high quality of the crystalinity. Pd nano-particles were generated by laser-ablating a Pd plate in pure water. The transmission electron microscope observation revealed that Pd nano-particles with a diameter in the range from 3 nm to several tens of nanometers were produced. Using these nano-structured materials, we successfully fabricated sensors by the dielectrophoresis techniques. In the case of the ultraviolet photosensor, a detection sensitivity of 10 nW/cm 2 was achieved and in the case of hydrogen sensing, the response time of less than 10 s has been demonstrated with Pd nano-particles.

AB - We describe the synthesis of nano-structured materials of ZnO and Pd by laser ablation and their applications to sensors. The synthesis of ZnO nano-wires was performed by nano-particle assisted deposition (NPAD) where nano-crystals were grown with nano-particles generated by laser-ablating a ZnO sintered target in an Ar background gas. The synthesized ZnO nano-wires were characterized with a scanning electron microscopy and the photoluminescent characteristics were examined under an excitation with the third harmonics of a Nd:YAG laser. The nano-wires with a diameter in the range from 50 to 150 nm and a length of up to 5 μm were taken out of the substrate by laser blow-off technique and/or sonication. It was confirmed that the nano-wires showed the stimulated emission under optical pumping, indicating a high quality of the crystalinity. Pd nano-particles were generated by laser-ablating a Pd plate in pure water. The transmission electron microscope observation revealed that Pd nano-particles with a diameter in the range from 3 nm to several tens of nanometers were produced. Using these nano-structured materials, we successfully fabricated sensors by the dielectrophoresis techniques. In the case of the ultraviolet photosensor, a detection sensitivity of 10 nW/cm 2 was achieved and in the case of hydrogen sensing, the response time of less than 10 s has been demonstrated with Pd nano-particles.

UR - http://www.scopus.com/inward/record.url?scp=34447298378&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447298378&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2007.02.152

DO - 10.1016/j.apsusc.2007.02.152

M3 - Article

AN - SCOPUS:34447298378

VL - 253

SP - 7840

EP - 7847

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

IS - 19

ER -