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Title: Ultralow duty cycle chopper instigated low power continuous wave laser assisted synthesis of silver nanoparticles : a novel approach Authors: ID Swapna, Mohanachandran Nair Sindhu (Author) ID Ashik, Abdul Rahim Sajeela Beevi (Author) ID Krishnanunni, Ramachandran Nair Amba Devi (Author) ID Nampoori, Vadakkedathu Parameswaran Narayanan (Author) ID Sankararaman, Sankaranarayana Iyer (Author) Files: https://lia.scitation.org/doi/10.2351/7.0000215   Language: English Work type: Unknown Typology: 1.01 - Original Scientific Article Organization: UNG - University of Nova Gorica Abstract: This paper is the first report of advancement in the drastic reduction of the laser power density from 105 to 7.5 W/cm2 for the synthesis of silver nanoparticles (SNPs) using a low power (60 mW) continuous-wave (cw) laser and a specially designed ultralow duty cycle (3%) optical chopper wheel for modulating the laser beam at low frequencies (2 Hz). The target is irradiated by keeping it in a liquid medium at 40–60 °C to produce quantum dots to SNPs of size less than 40 nm. The UV-visible spectroscopic and electron microscopic analyses confirm the formation of quantum dots and SNPs of size-dependent bandgap energy varying from 1.92 to 2.37 eV. The photoluminescence studies not only support the above observations but also reveal the blue emission upon UV excitation through the chromaticity diagram. The proposed greener approach using the low power cw laser is cost-effective when compared with the high-power laser-assisted synthesis of SNPs reported until now. Keywords: cw laser, silver nanoparticle, ultralow duty cycle, chopper Year of publishing: 2020 Number of pages: str. 042017-1-042017-8 Numbering: Vol. 32, iss. 4 PID: 20.500.12556/RUNG-7405  COBISS.SI-ID: 113331203  UDC: 54 ISSN on article: 1938-1387 DOI: 10.2351/7.0000215  NUK URN: URN:SI:UNG:REP:7AK99ASF Publication date in RUNG: 30.06.2022 Views: 1160 Downloads: 26 Metadata:     Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

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Record is a part of a journal

Title:	Journal of laser applications
Shortened title:	J. laser appl.
Publisher:	Chapman & Hall
ISSN:	1938-1387
COBISS.SI-ID:	521458457

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