Formation and dynamics of Au nanoparticles in a silica-glass: synergistic effects of temperature and fluences of ion irradiations

Srivastava, Sachin; Tomar, Rajguru; Amirthapandian, S.; Magudapathy, P.; Das, Avik; Gangopadhyay, P.; David, C.

doi:10.1007/s00339-018-2061-z

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…It is believed that the realization of elongation requires several basic conditions as follows: the high enough energy (hundreds of MeV) and proper fluence (≈10 13 ions cm −2 ) of implanted ions to form the ion tracks in the dielectrics; the larger diameter of NPs than the width of tracks (usually larger than 10 nm); and the suitable dielectrics. [ 90–102 ] It should be noted that the size condition of NPs for elongation is still under debate; and some experimental and theoretical studies on smaller NPs for effective elongation have been reported. [ 81 ] In this way, the NP–dielectrics systems can be well designed with tunable physical properties by optimizing the parameters during ion beam processing.…”

Section: Ion Beam Synthesis Of Nanoparticlesmentioning

confidence: 99%

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Pang

et al. 2020

Advanced Optical Materials

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The zero‐dimensional metallic nanoparticles (NPs) have attracted tremendous attention in various areas owing to the collective oscillation of electron gas that couples with electromagnetic field, known as localized surface plasmon resonance (LSPR). In practical applications, the tailoring of LSPR effect is of significant importance for promising photonic devices with designed nanocomposite systems and enhanced optical properties. Ion beam technology has been demonstrated to be an efficient method to fabricate NPs embedded in dielectrics for LSPR tailoring and material modification. By manipulating the parameters of ion beams, the shape, size, and structure of NPs can be well controlled, which enables the dielectrics to possess novel linear and nonlinear optical properties. In this review, the latest research progress on the ion beam synthesis of various NPs is systematically summarized. The tailoring of linear and nonlinear optical properties of dielectrics by NPs is discussed in detail. Selected applications are presented to indicate the development of the plasmonic NPs in dielectric systems for photonic applications.

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Section: Ion Beam Synthesis Of Nanoparticlesmentioning

confidence: 99%

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Pang

et al. 2020

Advanced Optical Materials

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“…[1][2][3][4][5] Unprecedented popularity of nanosciences and the huge success of nanotechnology encompassing cross-disciplinary fields have been realized as results of diverse and highly sophisticated nanofabrication processing techniques. [6][7][8][9] Present nanofabrication technology has reached a much matured stage to tailor interesting nanostructures with superior control of sizes, shapes and alloy compositions. [10,11] Apart from pure single component nanomaterials, metallic alloy nanoparticles and metal-semiconductor hybrid nanostructures with controlled compositions of constituting elements have also been synthesized.…”

Section: Introductionmentioning

confidence: 99%

“…During the past as well as recent times, the subject nanosciences have had witnessed great research interests and overwhelming enthusiasm among the researchers working in multidisciplinary areas of physics, chemistry, materials sciences and related fields, including biology and cancer research [1–5] . Unprecedented popularity of nanosciences and the huge success of nanotechnology encompassing cross‐disciplinary fields have been realized as results of diverse and highly sophisticated nanofabrication processing techniques [6–9] . Present nanofabrication technology has reached a much matured stage to tailor interesting nanostructures with superior control of sizes, shapes and alloy compositions [10,11] .…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence Quenching Upon Growth of Metal Nanoparticles: Quantum‐Mechanical Views

Gangopadhyay

2024

ChemPhysChem

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In dictating the optical processes in metal nanoparticles, for instance, quantum nature of free electrons is significantly dominant and plays very crucial roles at the level of nanoscale dimensions of materials. As consequences of the quantum‐confinement effects on the conduction electrons, surface‐plasmon resonance induced optical absorption and light emission properties of metal nanoparticles are found to be strongly dependent on physical dimensions of the nanomaterials. In addition, surface‐confined acoustic vibration (phonon) modes have been experimentally observed to depend on the sizes of the metal nanoparticles. Also, interestingly, tuning of the surface‐plasmon resonance condition is found to enhance the intensity of the acoustic Raman modes in metal nanoparticles. The study highlights the role of plasmon‐phonon coupling in Co metal nanoparticles embedded in a silica‐glass. In the research field of nanosciences and nanotechnologies, extraordinary behaviour and properties of nanoscale matters are investigated. In this context, interesting studies have been discussed in this review article to elaborate optical, chemical and photoluminescence properties of nanoscale Ag metal particles. Subtle detection of optical phenomena associated with the excited many‐body electronic processes in the metal nanoparticles, for example, are very interesting but definitely challenging. Here we make an attempt to find out how the thermal growth of Ag metal nanoparticles in a glass matrix snuffs out the light emission from the samples? Quantum mechanical interpretations of the underlying processes about the quenching of photoluminescence phenomena with the growth of the metal nanoparticles will help to fine tune the optical properties of plasmonic systems as well as to harness potential applications of the nanomaterials.

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“…The possibility to tune and customize the physical properties of various microscopic [10,11] and nanoscopic objects [12,13] by modulating the shape using energetic ion beam irradiations represents a unique approach that is independent of many of the constraints associated with conventional shape modification methods. While there has been a great deal of published articles on irradiation-induced shape modification, so far, the investigations are largely localized in particular noble metallic NPs such as Co [14,15], Au [16][17][18][19][20][21][22][23][24][25][26], Ag [27][28][29][30] and Ni [31][32][33]. The high sensitivity of such NPs to the energy deposited in their electronic systems makes them particularly attractive for shape modification by using ion beam irradiation.…”

Section: Introductionmentioning

confidence: 99%

Irradiation induced elongation of Fe nanoparticles embedded in silica films

Dawi

Ommar

Ackermann

et al. 2020

International Journal of Smart and Nano Materials

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Irradiation with swift heavy ions causes the deformation of Ferric nanoparticles in direction of the ion beam. Fe nanoparticles with mean diameter of about 20 nm were prepared by gas flow sputtering and subsequently confined within silica films. Two silica films wherein two different densities of Fe nanoparticles are encapsulated were irradiated with 50 MeV Ag ions with fluences of few 10 14 ions.cm −2 at 300 K and normal incidence. Transmission electron microscopy analysis shows that the spherical Fe nanoparticles are deformed into prolate nanorods aligned in direction of the incident ion beam. The depth distribution profiles of irradiated particles reveal the presence of a critical fluence above which the elongation kinetics becomes dependent on the nanoparticles density. Analysis indicates that for the lower density particles, a saturation length is reached under irradiation to fluence between 3-4 × 10 14 ions.cm −2. However, for the higher density, collective growth into aligned nanowires is presumed to take place. Hysteresis curves of the saturation magnetization and coercivity indicate an increasing magnetic anisotropy, which can be correlated with the deformation of nanoparticles in the direction of the ion beam.

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Formation and dynamics of Au nanoparticles in a silica-glass: synergistic effects of temperature and fluences of ion irradiations

Cited by 3 publications

References 31 publications

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Photoluminescence Quenching Upon Growth of Metal Nanoparticles: Quantum‐Mechanical Views

Irradiation induced elongation of Fe nanoparticles embedded in silica films

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