Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission

Random lasing emission was investigated from different ZnO nanostructures: a transition from nanowalls to nanoflakes; prepared on seeded glass substrate using simple chemical bath deposition method. The transition geometry of ZnO nanostructures were achieved simply by tuning the equimolar concentrat...

Full description

Bibliographic Details
Main Authors: Nurizati Rosli, Mohd Mahadi Halim, Md Roslan Hashim, Wan Maryam Wan Ahmad Kamil, Gia-Yuan Zhuang, Si-Yuan Chan, Hsu-Cheng Hsu
Format: Article
Language:English
Published: Elsevier 2021-08-01
Series:Results in Physics
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2211379721006355
id doaj-b69be129d67541abb34c2d0f27571428
record_format Article
spelling doaj-b69be129d67541abb34c2d0f275714282021-07-13T04:09:38ZengElsevierResults in Physics2211-37972021-08-0127104528Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emissionNurizati Rosli0Mohd Mahadi Halim1Md Roslan Hashim2Wan Maryam Wan Ahmad Kamil3Gia-Yuan Zhuang4Si-Yuan Chan5Hsu-Cheng Hsu6School of Physics, Universiti Sains Malaysia, 11800 USM Penang, MalaysiaSchool of Physics, Universiti Sains Malaysia, 11800 USM Penang, Malaysia; Corresponding author.School of Physics, Universiti Sains Malaysia, 11800 USM Penang, MalaysiaSchool of Physics, Universiti Sains Malaysia, 11800 USM Penang, MalaysiaDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanRandom lasing emission was investigated from different ZnO nanostructures: a transition from nanowalls to nanoflakes; prepared on seeded glass substrate using simple chemical bath deposition method. The transition geometry of ZnO nanostructures were achieved simply by tuning the equimolar concentration of the chemical bath solution, zinc nitrate hexahydrate, and hexamethylenetetramine from 0.15 M, 0.20 M to 0.25 M. This leads to the changes in particle size of nanostructures from 168.47 nm to 365.91 nm, and finally to 534.07 nm. The population decreased from 131 nanostructures to 100, and finally to 26 nanostructures based on a surface area of 2.8 µm × 2.5 µm, and accordingly enhanced crystallite size was observed as 90.21 nm, 98.04 nm to 110.79 nm for the nanowalls to nanoflakes respectively. These physical variations of the scattering medium affect random lasing emission threshold whereby the threshold excitation power density was reduced from 40 kW/cm2 to 17.14 kW/cm2, and finally to 14.29 kW/cm2 when the structure was in the form of nanoflakes. The emission wavelength from the structures shows a Stokes shift pattern and self-reliant while maintaining a stable emission at 379.7 nm (0.15 M), 382.7 nm (0.20 M), and 387.2 nm (0.25 M). This work demonstrates that by simply tuning the chemical bath solution molarities, changes in nanostructures from nanowalls to nanoflakes were obtained, and upon optical pumping, nanoflakes showed the lowest threshold for random lasing to occur indicating the best structure for ZnO random lasers.http://www.sciencedirect.com/science/article/pii/S2211379721006355Semiconductor fabricationNanostructuresRandom lasingLasingZinc Oxide
collection DOAJ
language English
format Article
sources DOAJ
author Nurizati Rosli
Mohd Mahadi Halim
Md Roslan Hashim
Wan Maryam Wan Ahmad Kamil
Gia-Yuan Zhuang
Si-Yuan Chan
Hsu-Cheng Hsu
spellingShingle Nurizati Rosli
Mohd Mahadi Halim
Md Roslan Hashim
Wan Maryam Wan Ahmad Kamil
Gia-Yuan Zhuang
Si-Yuan Chan
Hsu-Cheng Hsu
Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission
Results in Physics
Semiconductor fabrication
Nanostructures
Random lasing
Lasing
Zinc Oxide
author_facet Nurizati Rosli
Mohd Mahadi Halim
Md Roslan Hashim
Wan Maryam Wan Ahmad Kamil
Gia-Yuan Zhuang
Si-Yuan Chan
Hsu-Cheng Hsu
author_sort Nurizati Rosli
title Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission
title_short Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission
title_full Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission
title_fullStr Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission
title_full_unstemmed Physical and optical effect of ZnO nanowalls to nanoflakes on random lasing emission
title_sort physical and optical effect of zno nanowalls to nanoflakes on random lasing emission
publisher Elsevier
series Results in Physics
issn 2211-3797
publishDate 2021-08-01
description Random lasing emission was investigated from different ZnO nanostructures: a transition from nanowalls to nanoflakes; prepared on seeded glass substrate using simple chemical bath deposition method. The transition geometry of ZnO nanostructures were achieved simply by tuning the equimolar concentration of the chemical bath solution, zinc nitrate hexahydrate, and hexamethylenetetramine from 0.15 M, 0.20 M to 0.25 M. This leads to the changes in particle size of nanostructures from 168.47 nm to 365.91 nm, and finally to 534.07 nm. The population decreased from 131 nanostructures to 100, and finally to 26 nanostructures based on a surface area of 2.8 µm × 2.5 µm, and accordingly enhanced crystallite size was observed as 90.21 nm, 98.04 nm to 110.79 nm for the nanowalls to nanoflakes respectively. These physical variations of the scattering medium affect random lasing emission threshold whereby the threshold excitation power density was reduced from 40 kW/cm2 to 17.14 kW/cm2, and finally to 14.29 kW/cm2 when the structure was in the form of nanoflakes. The emission wavelength from the structures shows a Stokes shift pattern and self-reliant while maintaining a stable emission at 379.7 nm (0.15 M), 382.7 nm (0.20 M), and 387.2 nm (0.25 M). This work demonstrates that by simply tuning the chemical bath solution molarities, changes in nanostructures from nanowalls to nanoflakes were obtained, and upon optical pumping, nanoflakes showed the lowest threshold for random lasing to occur indicating the best structure for ZnO random lasers.
topic Semiconductor fabrication
Nanostructures
Random lasing
Lasing
Zinc Oxide
url http://www.sciencedirect.com/science/article/pii/S2211379721006355
work_keys_str_mv AT nurizatirosli physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
AT mohdmahadihalim physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
AT mdroslanhashim physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
AT wanmaryamwanahmadkamil physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
AT giayuanzhuang physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
AT siyuanchan physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
AT hsuchenghsu physicalandopticaleffectofznonanowallstonanoflakesonrandomlasingemission
_version_ 1721306387454099456