Sains Malaysiana 43(2)(2014):
283–287
Carbon Ion-beam-induced Modification in Structural and
Electrical Properties
of ZnO Nanowires
(Alur-ion Karbon Teraruh terhadap Modifikasi Struktur dan Sifat
Elektrik Nano Wayar ZnO)
JAVED IQBAL*1, H. TABASSUM1, ISHAQ
AHMAD2, TARIQ
JAN1, C.F.
DEE3,
M. MADHUKU4A.A. UMAR3& N.
AHMAD1
1Laboratory of Nanoscience and Technology, Department of Physics
International Islamic University Islamabad, Pakistan
2Experimental Physics Labs, National Center for Physics, Islamabad
44000, Pakistan
3Institute of Microengineering and Nanoelectronics, Universiti
Kebangsaan Malaysia
43600 Bangi, Selangor, Malaysia
4Themba LABS, Private Bag 11, Wits 2050, Johannesburg, South
Africa
Diserahkan: 7 Januari 2013/Diterima: 31 Julai 2013
ABSTRACT
Zinc oxide nanowires (ZnO NWs) have an efficacious place in nanoworld
due to their tremendous properties and applications. In the present work,
structural and electrical properties of ZnO NWs have been modified by
carbon (C) ions- beam irradiation. With ion-beam energy of 0.8MeV, the physical
behaviors of NWs
have been studied under different doses from 1×1012 to 1×1014 ions/cm2.
The microstructural and Raman spectroscopy studies showed that the wurtzite
crystal structure of the ZnO NWs has been changed into disordered amorphous
one under high C ion doses. Whereas, the XRD results showed that Zn nanoparticles are
fabricated at high C ion-beam irradiation on ZnO NWs. Scanning electron
microscopy (SEM)
depicts the formation of cross junctions and parallel junctions between ZnO NWs
after C ion irradiation. DC conductivity measurements have confirmed
that the conductivity of NWs decreases with increase in C ion doses. It
is concluded that the lattice defects significantly contribute to decrease in
the conductivity of ZnO NWs.
Keywords: Electrical conductivity; ion-beam irradiation; lattice
defects; ZnO nanowires
ABSTRAK
Nano wayar zink oksida (Zn NWs) telah mendapat perhatian di dalam dunia
nano kerana sifat dan kegunaannya yang pelbagai. Dalam kajian yang dilakukan,
struktur dan sifat elektrik Zn NWs dimodifikasi dengan radiasi alur-ion
karbon. Kelakuan fizikal NMs telah dikaji dengan menggunakan tenaga alur-ion
sebanyak 0.8 MeV, pada julat 1×1012 sehingga 1×1014 ion/cm2. Kajian mikrostruktur dan spektrum Raman pada dos C yang tinggi menunjukkan
struktur hablur wurtzit ZnO telah bertukar kepada amorfus yang tidak tersusun.
Manakala keputusan XRD menunjukkan nanozarah Zn, terbentuk di
atas Zn NWs
apabila dikenakan pancaran alur-ion C yang tinggi. Mikroskop elektron imbasan (SEM)
menunjukkan kehadiran simpang silang dan simpang selari antara Zn NWs
selepas radiasi ion C. Pengujian kekonduksian DC mengesahkan kekonduksian NMs
berkurangan dengan peningkatan dos ion C. Sebagai kesimpulan, kecacatan kekisi
yang ketara telah menyebabkan penurunan kekonduksian ZnO NWs.
Kata kunci: Kecacatan kekisi; kekonduksian
elektrik; nano wayar Zn; radiasi alur-ion
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*Pengarang
untuk surat-menyurat; email: javed.saggu@iiu.edu.pk
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