Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods

Fangzhou Liu; Yu Hang Leung; Aleksandra B. Djurišić; Alan Man Ching Ng; Wai Kin Chan; Ka Long Ng; Kam Sing Wong; Changzhong Liao; Kaimin Shih; Charles Surya

doi:10.1021/jp506468r

Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods

Fangzhou Liu, Yu Hang Leung, Aleksandra B. Djurišić, Alan Man Ching Ng, Wai Kin Chan, Ka Long Ng, Kam Sing Wong, Changzhong Liao, Kaimin Shih, Charles Surya

Research output: Contribution to journal › Article

19 Citations (Scopus)

Abstract

ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.

Original language	English
Pages (from-to)	22760-22767
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	39
DOIs	https://doi.org/10.1021/jp506468r
Publication status	Published - Jan 1 2014
Externally published	Yes

Fingerprint

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

Cite this

Liu, F., Leung, Y. H., Djurišić, A. B., Ng, A. M. C., Chan, W. K., Ng, K. L., Wong, K. S., Liao, C., Shih, K., & Surya, C. (2014). Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods. Journal of Physical Chemistry C, 118(39), 22760-22767. https://doi.org/10.1021/jp506468r

Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods. / Liu, Fangzhou; Leung, Yu Hang; Djurišić, Aleksandra B.; Ng, Alan Man Ching; Chan, Wai Kin; Ng, Ka Long; Wong, Kam Sing; Liao, Changzhong; Shih, Kaimin; Surya, Charles.

In: Journal of Physical Chemistry C, Vol. 118, No. 39, 01.01.2014, p. 22760-22767.

Research output: Contribution to journal › Article

@article{e85a7bf561dd4b07ae3629a2271a2286,

title = "Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods",

abstract = "ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.",

author = "Fangzhou Liu and Leung, {Yu Hang} and Djuri{\v s}i{\'c}, {Aleksandra B.} and Ng, {Alan Man Ching} and Chan, {Wai Kin} and Ng, {Ka Long} and Wong, {Kam Sing} and Changzhong Liao and Kaimin Shih and Charles Surya",

year = "2014",

month = jan

day = "1",

doi = "10.1021/jp506468r",

language = "English",

volume = "118",

pages = "22760--22767",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "39",

}

TY - JOUR

T1 - Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods

AU - Liu, Fangzhou

AU - Leung, Yu Hang

AU - Djurišić, Aleksandra B.

AU - Ng, Alan Man Ching

AU - Chan, Wai Kin

AU - Ng, Ka Long

AU - Wong, Kam Sing

AU - Liao, Changzhong

AU - Shih, Kaimin

AU - Surya, Charles

PY - 2014/1/1

Y1 - 2014/1/1

N2 - ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.

AB - ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.

UR - http://www.scopus.com/inward/record.url?scp=84907781868&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84907781868&partnerID=8YFLogxK

U2 - 10.1021/jp506468r

DO - 10.1021/jp506468r

M3 - Article

AN - SCOPUS:84907781868

VL - 118

SP - 22760

EP - 22767

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 39

ER -

Access to Document

10.1021/jp506468r