Phenomenological understanding of dewetting and embedding of noble metal nanoparticles in thin films induced by ion irradiation

Prakash, Jai; Tripathi, Ambuj; Gautam, Sanjeev; Chae, Keun Hwa; Song, Joong-Ho; Rigato, V.; Tripathi, J.K.

doi:10.1016/j.matchemphys.2014.06.038

Cited by 29 publications

(25 citation statements)

References 37 publications

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“…42 , which is comparable to our estimated value. It should be mentioned here that the surface free energy of free Au nanoparticle has been found to be 8.78 J m −2 39 , which is much greater than that of the bulk Au. If this value is considered, the surface energy of Au nanoparticle embedded in SiO 2 will be significantly lower 24,39 .…”

Section: Resultsmentioning

confidence: 71%

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Ultraviolet and Infrared luminescent Au-rich nanostructure growth in SiO2 by burrowing and inverse Oswald ripening process

Datta

Chettah

Maiti

et al. 2019

Sci Rep

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We study the evolution of nanoparticle morphology through successive stages when Au-Si bilayer on SiO2 is irradiated with 500 keV Xe-ions and resulting luminescence in the UV, Visible and infrared range. An array of nanoscale island morphology is developed on the silica surface in the initial stage of evolution which undergoes gradual burrowing in the silica matrix accompanied by elongation of large ones in the direction of incident ions under cumulative ion irradiation. Burrowing is found to occur in order to minimize the surface free energy of the nanoparticles. Numerical simulation based on the unified thermal spike model shows formation of molten latent tracks due to ions energy release which drive the dewetting of the metal layer and further give mobility to nanoparticle atoms leading to burrowing in the later stage of evolution and elongation of large nanoparticles. Satellite nanoparticles are observed to grow around Au nanoparticles embedded in silica through nucleation of Au atoms dissolved in the matrix by incident ions. The varying diameters of the Au satellite nanoparticles seem to result in luminescence in the UV and infrared range. The observed structure may find application in surface enhanced Raman scattering, catalysis, and LEDs.

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Section: Resultsmentioning

confidence: 71%

“…for 800 keV Kr-ion irradiation on Pt thin film on SiO 2 and Al 2 O 3 38 , and by Prakash et al . for 150 keV Ar-ion irradiation on Au thin film deposited on polymer matrix 23,39 . Burrowing of nanostructures on a substrate surface can be understood by the thermodynamic instability of the structures.…”

Section: Resultsmentioning

confidence: 99%

Ultraviolet and Infrared luminescent Au-rich nanostructure growth in SiO2 by burrowing and inverse Oswald ripening process

Datta

Chettah

Maiti

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Various synthesis and doping techniques, such as chemical vapor deposition, ion beam implantation, and hydrothermal, should be employed by varying the experimental parameters during the synthesis process to optimize the doping concentrations and morphologies of the graphene nanostructures. 139,160–162 The fabrication should be focused on the development of low cost, environmentally friendly methodologies to produce stable and recyclable nanomaterials, which could be used on the industrial scale with high-performance photocatalytic activity. 49 The coupling of graphene nanostructures with plasmonic nanomaterials 163,164 and other functional nanomaterials could be another promising way to harness solar light for efficient photocatalytic activities and other energy applications.…”

Section: Discussionmentioning

confidence: 99%

Design and engineering of graphene nanostructures as independent solar-driven photocatalysts for emerging applications in the field of energy and environment

Sharma

Yadav

Chen

et al. 2022

Mol. Syst. Des. Eng.

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“…metal, graphene, semiconductors) etc. [ 37 , 39 , 40 , [52] , [53] , [54] , [55] , [56] , [57] , [58] ]. One of the important fact is that TiO 2 in nanodimensional structures exhibit even better functionality as compared to its bulk TiO 2 material because of the enhanced surface area.…”

Section: Tio 2 Photocatalystsmentioning

confidence: 99%

Photocatalytic TiO2 nanomaterials as potential antimicrobial and antiviral agents: Scope against blocking the SARS-COV-2 spread

Prakash

Cho

Mishra

2022

Micro and Nano Engineering

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104

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The whole world is struggling with current coronavirus pandemic that shows urgent need to develop novel technologies, medical innovations or innovative materials for controlling SARS-CoV-2 infection. The mode of infection of SARS-CoV-2 is still not well known and seems to spread through surface, air, and water. Therefore, the whole surrounding environment needs to be disinfected with continuous function. For that purpose, materials with excellent antiviral properties, cost effective, environmental friendly and practically applicable should be researched. Titanium dioxide (TiO 2 ) under ultraviolet light produces strong oxidative effect and is utilized as photocatalytic disinfectant in biomedical field. TiO 2 based photocatalysts are effective antimicrobial/antiviral agents under ambient conditions with potential to be used even in indoor environment for inactivation of bacteria/viruses. Interestingly, recent studies highlight the effective disinfection of SARS-CoV-2 using TiO 2 photocatalysts. Here, scope of TiO 2 photocatalysts as emerging disinfectant against SARS-CoV-2 infection has been discussed in view of their excellent antibacterial and antiviral activities against various bacteria and viruses (e.g. H1N1, MNV, HSV, NDV, HCoV etc.). The current state of development of TiO 2 based nano-photocatalysts as disinfectant shows their potential to combat with SARS-CoV-2 viral infection and are promising for any other such variants or viruses, bacteria in future studies.

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Phenomenological understanding of dewetting and embedding of noble metal nanoparticles in thin films induced by ion irradiation

Cited by 29 publications

References 37 publications

Ultraviolet and Infrared luminescent Au-rich nanostructure growth in SiO2 by burrowing and inverse Oswald ripening process

Ultraviolet and Infrared luminescent Au-rich nanostructure growth in SiO2 by burrowing and inverse Oswald ripening process

Design and engineering of graphene nanostructures as independent solar-driven photocatalysts for emerging applications in the field of energy and environment

Photocatalytic TiO2 nanomaterials as potential antimicrobial and antiviral agents: Scope against blocking the SARS-COV-2 spread

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