Characterization of the silver thin films produced at different substrate temperatures

: In recent decades, the antimicrobial surfaces/coating properties towards a longlasting microbicidal effect have drawn enormous attention by researchers, they have been developed and used in a wide variety of high-touch hospital devices as a potential approach.
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Characterization of the silver thin films produced at different substrate temperaturesScience & Technology Development Journal, 22(4):356- 364 Open Access Full Text Article Original ResearchCharacterization of the silver thin films produced at differentsubstrate temperaturesTon Nu Quynh Trang1 , Le Thi Ngoc Tu2 , Tran Van Man3 , Vu Thi Hanh Thu1,* ABSTRACT Introduction: In recent decades, the antimicrobial surfaces/coating properties towards a long- lasting microbicidal effect have drawn enormous attention by researchers, they have been devel-Use your smartphone to scan this oped and used in a wide variety of high-touch hospital devices as a potential approach. Methods:QR code and download this article In this work, Ag NPs was synthesized by sputtering method at the different annealing tempera- tures of 100◦ C, 200◦ C, 300◦ C, and 400◦ C. Results: As a result, the as-synthesized Ag-300 exhibits the highest E. coli antibacterial performance compared with others. This can be attributed to the change of the Ag NPs toxicity based on the growth of nanoparticles during the deposition process related to the Ostwald ripening process, thermal activation and coalescence particles. Conclu- sion: This work provides an essential insight into the antimicrobial activity of Ag NPs-based films synthesized through the vacuum deposition technique, resulting in opening a new approach for enhancing the antimicrobial efficacy and prospects. Key words: Silver nanoparticles, antibacterial mechanism, vacuum deposition techniques, toxicity INTRODUCTION in a similar way to form silver ions, exerted against bacteria through a multifactorial process, and they Nanoparticles (NPs) have been considered as one of the most promising alternatives for traditional ma- were associated with inhibiting the growth of harmful terials in many fields of science and technology 1,2 , bacteria as they were harm to the bacterial cell wall1Faculty of Physics and Engineering due to nanoscale approaching physical characteris- and plasma membrane or restraint on DNA replica-Physics, VNUHCM-University of Science tion and protein 8 . They could be released by the nat-2 tics and functionalities that can be assigned to theFalculity of Physics, Dong Thap ural formation of ion Ag in the presence of reductiveUniversity different from their bulk counterparts. As an exam- ple, the antibacterial performance of nanomaterials components in the environment 9 .3Faculty of Chemistry, Moreover, the characteristic features of nanoparticlesVNUHCM-University of Science such as ZnO, TiO2 , and Ag NPs have drawn enor- mous attention in recent years for their desired appli- such as size, shape, density distribution have beenCorrespondence cations in biomedical applications, water disinfection, demonstrated to affect the antibacterial activity of AgVu Thi Hanh Thu, Faculty of Physics and and consumer goods 3,4 . However, a current draw- NPs significantly, this could be attributed to a dif-Engineering Physics, back is the synthesis and application of nanoparti- ferential release of Ag+ ions 10 . Previous researchesVNUHCM-University of Science cles to implement effective measures that can prevent in this field suggested that the effects of shapes andEmail: vththu@hcmus.edu.vn wound infections burns and chronic ulcers associated sizes prepared by wet ch ...