Sains Malaysiana 49(8)(2020):
1875-1890
http://dx.doi.org/10.17576/jsm-2020-4908-10
Opto-Electrical Investigation of
Zn Metal-Doped Cds and Their Application in Soft Lithographic Technique
(Kajian Opto-Elektrik ke
atas Zn Logam-terdop Cd dan Aplikasinya dalam Teknik Litografi Lembut)
GULALAI HUSSAIN1, UZMA JABEEN1*, IRFAN HAFEEZ2,
M NAJAM KHAN MALGHANI3, AYESHA MUSHTAQ1*, SABEENA RIZWAN1,
FARRUKH BASHIR1, FARIDA BEHLIL1, M AAMIR RAZA2 & SHAISTA ANJUM4
1Faculty of Basic Sciences, SBK Women’s University
Quetta, 87300, Pakistan
2Pakistan Council of Scientific and Industrial
Research, Pakistan
3Faculty of Engineering and Architecture, Takatu
campus BUITEMS Quetta, Pakistan
4Faculty of Life Sciences, University of
Balochistan, Quetta, Pakistan
Diserahkan:
12 Oktober 2019/Diterima: 26 Mac 2020
ABSTRACT
Un-doped
CdS and Zn metal-doped CdS (0.1-0.5 M) were synthesized by chemical
precipitation method. Properties like optical band gap and conductivity were determined by different characterization techniques.
UV-Visible spectroscopy was applied to estimate the
band gap where it showed a significant blue shift due to quantum confinement
effect. Size determined by scanning electron microscopy (SEM) was found to be
in nanorange from 41 to 60 nm for both un-doped and metal
doped CdS nanocrystals. EDAX confirmed the doping by showing peak for
Zn. XRD (X-ray diffraction) showed the lattice structure to be cubic for the
synthesized nanoparticles and conductivity for un-doped CdS was 7.69E-6 Ω-1m-1 where it changes to 9.25E-6 Ω-1m-1 and 7.98E-6 Ω-1m-1 for 0.2 M and 0.5 M Zn-doped
CdS, respectively. In order to obtain good results, nanocrystals having highest
conductivity are used in soft lithographic technique.
Here µTM (micro transfer-molding) was followed for patterning with
PDMS (poly-(dimethylsiloxane)) mold and silicon
substrate for better results.
Keywords: Band gap; blue shift; conductivity; lithography; Zn dopant
ABSTRAK
CdS
yang tidak terdop dan Zn logam-terdop (0.1-0.5M) disintesis dengan kaedah
pemendakan kimia. Sifat seperti jurang jalur optik dan kekonduksian ditentukan
oleh teknik pencirian yang berbeza. Spektroskopi Terlihat UV diterapkan untuk
menganggarkan jurang jalur yang menunjukkan peralihan warna biru yang ketara
kerana kesan pengurungan kuantum. Ukuran yang ditentukan oleh mikroskopi
elektron pengimbasan (SEM) didapati berada dalam jarak nano dari 41 hingga 60
nm untuk kristal nano CdS yang tidak dilekatkan dan
logam. EDAX mengesahkan pendopan dengan menunjukkan puncak
untuk Zn. XRD (difraksi sinar-X) menunjukkan struktur kisi menjadi kubik bagi
zarah nanopartesis yang disintesis dan kekonduksian untuk CdS tanpa pendopan
adalah 7.69E-6 Ω-1m-1 dan ia berubah menjadi 9.25E-6
Ω-1m-1 dan 7.98E-6 Ω-1m-1 masing-masing untuk 0.2 M dan 0.5 M Zn-terdop CdS. Untuk memperoleh hasil yang
baik, kristal nano yang mempunyai kekonduksian tertinggi digunakan dalam teknik
litografi lembut. Di sini µTM (acuan pemindahan mikro) dilakukan untuk
membuat corak dengan substrat acuan dan silikon PDMS (poli- (dimetilsiloksana))
untuk hasil yang lebih baik.
Kata
kunci: Jurang jalur; kekonduksian; litografi; peralihan biru; Zn dopan
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*Pengarang untuk surat-menyurat; email:
roha64@yahoo.com
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