TY  - JOUR
AU  - Singh, Ajaib
AU  - Schipmann, Susanne
AU  - Mathur, Aakash
AU  - Pal, Dipayan
AU  - Sengupta, Amartya
AU  - Klemradt, Uwe
AU  - Chattopadhyay, Sudeshna
TI  - Structure and morphology of magnetron sputter deposited ultrathin ZnO films on confined polymeric template
JO  - Applied surface science
VL  - 414
SN  - 0169-4332
CY  - Amsterdam
PB  - Elsevier
M1  - PUBDB-2019-01745
SP  - 114 - 123
PY  - 2017
N1  - © Elsevier B.V. ; Post referee fulltext in progress 2; Embargo 12 months from publication
AB  - The structure and morphology of ultra-thin zinc oxide (ZnO) films with different film thicknesses on confined polymer template were studied through X-ray reflectivity (XRR) and grazing incidence small angle X-ray scattering (GISAXS). Using magnetron sputter deposition technique ZnO thin films with different film thicknesses (<10 nm) were grown on confined polystyrene with ∼ 2R<sub>g</sub> film thickness, where R<sub>g</sub> ∼ 20 nm (R<sub>g</sub> is the unperturbed radius of gyration of polystyrene, defined by R<sub>g</sub> =  0.272 √M<sub>0</sub>, and M<sub>0</sub> is the molecular weight of polystyrene). The detailed internal structure, along the surface/interfaces and the growth direction of the system were explored in this study, which provides insight into the growth procedure of ZnO on confined polymer and reveals that a thin layer of ZnO, with very low surface and interface roughness, can be grown by DC magnetron sputtering technique, with approximately full coverage (with bulk like electron density) even in nm order of thickness, in 2–7 nm range on confined polymer template, without disturbing the structure of the underneath template. The resulting ZnO-polystyrene hybrid systems show strong ZnO near band edge (NBE) and deep-level (DLE) emissions in their room temperature photoluminescence spectra, where the contribution of DLE gets relatively stronger with decreasing ZnO film thickness, indicating a significant enhancement of surface defects because of the greater surface to volume ratio in thinner films.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000402216000015
DO  - DOI:10.1016/j.apsusc.2017.04.078
UR  - https://bib-pubdb1.desy.de/record/420899
ER  -