Near-field scanning optical microscopy of ZnO nanopatterns fabricated by micromolding in capillaries

S. K. Donthu; Z. Pan; G. S. Shekhawat; V. P. Dravid; B. Balakrisnan; S. Tripathy

doi:10.1063/1.1949712

Near-field scanning optical microscopy of ZnO nanopatterns fabricated by micromolding in capillaries

S. K. Donthu, Z. Pan, G. S. Shekhawat, V. P. Dravid, B. Balakrisnan, S. Tripathy

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

We report near-field scanning optical microscopy (NSOM) studies of 300-nm -wide ZnO nanopatterns fabricated by micromolding in capillary technique using a sol-gel route. Atomic force microscopy and scanning electron microscopy show that the patterns are continuous with uniform linewidths. Simultaneous topography and optical signal collected in NSOM scans exhibit nanoscale photoluminescence intensity distribution in the ZnO nanopatterns. The nanoscale spectral mapping shows very broad defect-induced green-yellow-red luminescence bands, at room temperature, when excited with a 514.5-nm Ar-ion laser. Our analyses demonstrate that spatially resolved ZnO luminescence features with an optical resolution of ≤300 nm can be obtained with NSOM while operating in collection mode, and underscore the need to couple nanoscale physical characterization with functional properties at the same scale.

Original language	English (US)
Article number	024304
Journal	Journal of Applied Physics
Volume	98
Issue number	2
DOIs	https://doi.org/10.1063/1.1949712
State	Published - Jul 15 2005

Funding

We acknowledge the Nanoscale Science and Engineering Initiative of the National Science Foundation (under NSF Award Number EEC-0118025), and the U.S. Department of Energy (DOE-BES) for support of this research. This work made use of facilities at Nanoscale Integrated Fabrication, Testing and Instrumentation Center.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.1949712

Cite this

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title = "Near-field scanning optical microscopy of ZnO nanopatterns fabricated by micromolding in capillaries",

abstract = "We report near-field scanning optical microscopy (NSOM) studies of 300-nm -wide ZnO nanopatterns fabricated by micromolding in capillary technique using a sol-gel route. Atomic force microscopy and scanning electron microscopy show that the patterns are continuous with uniform linewidths. Simultaneous topography and optical signal collected in NSOM scans exhibit nanoscale photoluminescence intensity distribution in the ZnO nanopatterns. The nanoscale spectral mapping shows very broad defect-induced green-yellow-red luminescence bands, at room temperature, when excited with a 514.5-nm Ar-ion laser. Our analyses demonstrate that spatially resolved ZnO luminescence features with an optical resolution of ≤300 nm can be obtained with NSOM while operating in collection mode, and underscore the need to couple nanoscale physical characterization with functional properties at the same scale.",

author = "Donthu, {S. K.} and Z. Pan and Shekhawat, {G. S.} and Dravid, {V. P.} and B. Balakrisnan and S. Tripathy",

note = "Funding Information: We acknowledge the Nanoscale Science and Engineering Initiative of the National Science Foundation (under NSF Award Number EEC-0118025), and the U.S. Department of Energy (DOE-BES) for support of this research. This work made use of facilities at Nanoscale Integrated Fabrication, Testing and Instrumentation Center.",

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AU - Donthu, S. K.

AU - Pan, Z.

AU - Shekhawat, G. S.

AU - Dravid, V. P.

AU - Balakrisnan, B.

AU - Tripathy, S.

N1 - Funding Information: We acknowledge the Nanoscale Science and Engineering Initiative of the National Science Foundation (under NSF Award Number EEC-0118025), and the U.S. Department of Energy (DOE-BES) for support of this research. This work made use of facilities at Nanoscale Integrated Fabrication, Testing and Instrumentation Center.

PY - 2005/7/15

Y1 - 2005/7/15

N2 - We report near-field scanning optical microscopy (NSOM) studies of 300-nm -wide ZnO nanopatterns fabricated by micromolding in capillary technique using a sol-gel route. Atomic force microscopy and scanning electron microscopy show that the patterns are continuous with uniform linewidths. Simultaneous topography and optical signal collected in NSOM scans exhibit nanoscale photoluminescence intensity distribution in the ZnO nanopatterns. The nanoscale spectral mapping shows very broad defect-induced green-yellow-red luminescence bands, at room temperature, when excited with a 514.5-nm Ar-ion laser. Our analyses demonstrate that spatially resolved ZnO luminescence features with an optical resolution of ≤300 nm can be obtained with NSOM while operating in collection mode, and underscore the need to couple nanoscale physical characterization with functional properties at the same scale.

AB - We report near-field scanning optical microscopy (NSOM) studies of 300-nm -wide ZnO nanopatterns fabricated by micromolding in capillary technique using a sol-gel route. Atomic force microscopy and scanning electron microscopy show that the patterns are continuous with uniform linewidths. Simultaneous topography and optical signal collected in NSOM scans exhibit nanoscale photoluminescence intensity distribution in the ZnO nanopatterns. The nanoscale spectral mapping shows very broad defect-induced green-yellow-red luminescence bands, at room temperature, when excited with a 514.5-nm Ar-ion laser. Our analyses demonstrate that spatially resolved ZnO luminescence features with an optical resolution of ≤300 nm can be obtained with NSOM while operating in collection mode, and underscore the need to couple nanoscale physical characterization with functional properties at the same scale.

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Near-field scanning optical microscopy of ZnO nanopatterns fabricated by micromolding in capillaries

Abstract

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