Tuning optical properties of noble metal nanoparticle-composed glasses by laser radiation

Nedyalkov, N.N.; Koleva, M.; Nikov, Ru; Stankova, N.E.; Iordanova, E.; Yankov, Georgi; Александров, Л. Н.; Iordanova, R.

doi:10.1016/j.apsusc.2018.09.024

Cited by 14 publications

(6 citation statements)

References 40 publications

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“…Gold nanoparticles (AuNPs) are extensively used in optical imaging due to their unique plasmonic properties, hence AuNPs-assisted bioimaging is mainly used in direct visualization, monitoring of biomolecular events and physiological process and in vivo deep-tissue imaging [90]. The modification of size and shape of the gold nanoparticles covered with borosilicate glasses have induced greater variations in optical properties [91]. Metallic nanoparticles like Ag nanoparticles (Ag NPs) can exhibit controllable optical properties and the optical property could be enhanced when it is combined with organic solar cells (OSC).…”

Section: Physical Properties Of Nanoparticlementioning

confidence: 99%

Therapeutic efficacy of nanoparticles and routes of administration

et al. 2019

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In modern-day medicine, nanotechnology and nanoparticles are some of the indispensable tools in disease monitoring and therapy. The term “nanomaterials” describes materials with nanoscale dimensions (< 100 nm) and are broadly classified into natural and synthetic nanomaterials. However, “engineered” nanomaterials have received significant attention due to their versatility. Although enormous strides have been made in research and development in the field of nanotechnology, it is often confusing for beginners to make an informed choice regarding the nanocarrier system and its potential applications. Hence, in this review, we have endeavored to briefly explain the most commonly used nanomaterials, their core properties and how surface functionalization would facilitate competent delivery of drugs or therapeutic molecules. Similarly, the suitability of carbon-based nanomaterials like CNT and QD has been discussed for targeted drug delivery and siRNA therapy. One of the biggest challenges in the formulation of drug delivery systems is fulfilling targeted/specific drug delivery, controlling drug release and preventing opsonization. Thus, a different mechanism of drug targeting, the role of suitable drug-laden nanocarrier fabrication and methods to augment drug solubility and bioavailability are discussed. Additionally, different routes of nanocarrier administration are discussed to provide greater understanding of the biological and other barriers and their impact on drug transport. The overall aim of this article is to facilitate straightforward perception of nanocarrier design, routes of various nanoparticle administration and the challenges associated with each drug delivery method.

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Section: Physical Properties Of Nanoparticlementioning

confidence: 99%

Therapeutic efficacy of nanoparticles and routes of administration

et al. 2019

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“…Many ways have been used to synthesize nanoparticles of inorganic metals (such as Au, Ag, and others) and semiconductors over the years (Zno, Ge, GaAs, Si, etc.) [4,5]. To make NPs, bulk material is employed in a physical approach that involves the condensation of a gaseous component.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Study Ag Nanoparticles via PLAL Technique: Influence of Different Number of Pulses

Thuraya Yarb Sabri,

Saif Khalel Jasim,

Ammar Ayesh Habeeb

et al. 2024

IJNeaM

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Using a quick, easy, and effective one-step synthesis method called Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG)-pulsed laser ablation in liquid (PLAL), silver nanoparticles (NPs) are physically created. By using a pulsed laser at 532 nm to vaporize a metallic target (in this case, silver) submerged in deionized water, silver colloidal solutions are separately created. Laser parameters pulse of number (100, 200, and 300 pulse/sec) with constant ablation energy 500 mJ. The cubic crystalline structure of Ag particles was revealed by XRD, along with the formation of a pure cubic crystal structure of Ag particles and another cubic crystal structure attributed to AgO particles. The subsequent FESEM images showed the formation of highly spherical crystals (mean diameter 25.003 nm, 24.43 nm, and 9.75 nm ). UV-Vis analysis reveals the absorption band of Ag NPs at (407, 406, and 404 nm), and the energy gap was (2.74, 2,79, and 2.95 eV ) respectively. The diagnosis of spherical colloidal Ag-NPs was approved by FESEM, and the PL spectra show two peaks at 320 and 639 nm, confirming the purity of the produced Ag-NPs. It is clear that the possibility of using the prepared nanoparticle in optoelectronics applications such as optical detectors, solar cells, and optical sensors.

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“…[13,22,23] As we know, there are many research reports available on size-dependent optical properties of noble metal nanoparticles. [24][25][26] In comparison, to best of our knowledge, systematic studies on the photoluminescence activity of nanoscale metal particles of different sizes in dielectric matrices are only a few. [27,28] Primarily, reduction of radiative recombination probability of electrons and holes, resulting in quenching of photoluminescence intensity has been observed with the growth of metal nanoparticles in glass matrices, as reported in the earlier studies.…”

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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Tuning optical properties of noble metal nanoparticle-composed glasses by laser radiation

Cited by 14 publications

References 40 publications

Therapeutic efficacy of nanoparticles and routes of administration

Therapeutic efficacy of nanoparticles and routes of administration

Preparation and Study Ag Nanoparticles via PLAL Technique: Influence of Different Number of Pulses

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

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