Low temperature preparation of CuO nanospheres and urchin-shaped structures via hydrothermal route

Rizwan Khan; Mohammad Vaseem; Lee Woon Jang; Jin Hyeon Yun; Yoon Bong Hahn; In Hwan Lee

doi:10.1016/j.jallcom.2014.04.170

Low temperature preparation of CuO nanospheres and urchin-shaped structures via hydrothermal route

Rizwan Khan, Mohammad Vaseem, Lee Woon Jang, Jin Hyeon Yun, Yoon Bong Hahn, In Hwan Lee

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

16 Citations (Scopus)

Abstract

We demonstrated a simple one-step hydrothermal route for the preparation of cupric oxide (CuO) nanoparticles in the form of either nanospheres or urchin-shaped structures. The choice between these two types of structures was easily achieved by switching between NaOH or NaBH₄ during the nanoparticles synthesis. The first resulted in the production of nanospheres, the second gave rise to the urchin-like structures. Possible growth mechanisms for the formation of CuO nanospheres were discussed. Structural and optical properties of these nanospheres were investigated and their band-gap was found to be 1.54 eV. The higher band-gap value compared to the bulk CuO was attributed to the strong quantum confinement of charge carriers in the small nanoparticles comprising the nanospheres.

Original language	English
Pages (from-to)	211-214
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	609
DOIs	https://doi.org/10.1016/j.jallcom.2014.04.170
Publication status	Published - 2014 Oct 5
Externally published	Yes

Keywords

Chemical synthesis
Optical properties
Oxide materials

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2014.04.170

Cite this

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title = "Low temperature preparation of CuO nanospheres and urchin-shaped structures via hydrothermal route",

abstract = "We demonstrated a simple one-step hydrothermal route for the preparation of cupric oxide (CuO) nanoparticles in the form of either nanospheres or urchin-shaped structures. The choice between these two types of structures was easily achieved by switching between NaOH or NaBH4 during the nanoparticles synthesis. The first resulted in the production of nanospheres, the second gave rise to the urchin-like structures. Possible growth mechanisms for the formation of CuO nanospheres were discussed. Structural and optical properties of these nanospheres were investigated and their band-gap was found to be 1.54 eV. The higher band-gap value compared to the bulk CuO was attributed to the strong quantum confinement of charge carriers in the small nanoparticles comprising the nanospheres.",

keywords = "Chemical synthesis, Optical properties, Oxide materials",

author = "Rizwan Khan and Mohammad Vaseem and Jang, {Lee Woon} and Yun, {Jin Hyeon} and Hahn, {Yoon Bong} and Lee, {In Hwan}",

note = "Funding Information: This research was supported by National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT & Future Planning ( 2013R1A2A2A07067688 , 2010-0019626 ).",

year = "2014",

month = oct,

day = "5",

doi = "10.1016/j.jallcom.2014.04.170",

language = "English",

volume = "609",

pages = "211--214",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Low temperature preparation of CuO nanospheres and urchin-shaped structures via hydrothermal route

AU - Khan, Rizwan

AU - Vaseem, Mohammad

AU - Jang, Lee Woon

AU - Yun, Jin Hyeon

AU - Hahn, Yoon Bong

AU - Lee, In Hwan

N1 - Funding Information: This research was supported by National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT & Future Planning ( 2013R1A2A2A07067688 , 2010-0019626 ).

PY - 2014/10/5

Y1 - 2014/10/5

N2 - We demonstrated a simple one-step hydrothermal route for the preparation of cupric oxide (CuO) nanoparticles in the form of either nanospheres or urchin-shaped structures. The choice between these two types of structures was easily achieved by switching between NaOH or NaBH4 during the nanoparticles synthesis. The first resulted in the production of nanospheres, the second gave rise to the urchin-like structures. Possible growth mechanisms for the formation of CuO nanospheres were discussed. Structural and optical properties of these nanospheres were investigated and their band-gap was found to be 1.54 eV. The higher band-gap value compared to the bulk CuO was attributed to the strong quantum confinement of charge carriers in the small nanoparticles comprising the nanospheres.

AB - We demonstrated a simple one-step hydrothermal route for the preparation of cupric oxide (CuO) nanoparticles in the form of either nanospheres or urchin-shaped structures. The choice between these two types of structures was easily achieved by switching between NaOH or NaBH4 during the nanoparticles synthesis. The first resulted in the production of nanospheres, the second gave rise to the urchin-like structures. Possible growth mechanisms for the formation of CuO nanospheres were discussed. Structural and optical properties of these nanospheres were investigated and their band-gap was found to be 1.54 eV. The higher band-gap value compared to the bulk CuO was attributed to the strong quantum confinement of charge carriers in the small nanoparticles comprising the nanospheres.

KW - Chemical synthesis

KW - Optical properties

KW - Oxide materials

UR - http://www.scopus.com/inward/record.url?scp=84900866174&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2014.04.170

DO - 10.1016/j.jallcom.2014.04.170

M3 - Article

AN - SCOPUS:84900866174

SN - 0925-8388

VL - 609

SP - 211

EP - 214

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Low temperature preparation of CuO nanospheres and urchin-shaped structures via hydrothermal route

Abstract

Keywords

ASJC Scopus subject areas

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