Optical nanomaterials with focus on rare earth doped oxide: A Review

Gupta, Santosh K.; Sudarshan, K.; Kadam, R.M.

doi:10.1016/j.mtcomm.2021.102277

Cited by 67 publications

(45 citation statements)

References 399 publications

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“…The alteration of NPs' size and shape changes their properties on the atomic level and has the potential to design their optimal physicochemical, optical and biological properties for various applications [32,34]. The distinctive physicochemical and optical properties of nanoparticles allow the design of systems with high sensitivity, large surface areas, special surface effects, high functional density, catalytic effects and enhanced optical emission [34,35]. In addition, variable NP sizes and shapes are likely to influence particle transport behavior in biological systems, as well as how cells sense and respond to the particle [36].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Properties of Palladium and Platinum Nanoparticles: A New Tool for Combating Food-Borne Pathogens

Chlumsky

Purkrtová

Míchová

et al. 2021

IJMS

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Although some metallic nanoparticles (NPs) are commonly used in the food processing plants as nanomaterials for food packaging, or as coatings on the food handling equipment, little is known about antimicrobial properties of palladium (PdNPs) and platinum (PtNPs) nanoparticles and their potential use in the food industry. In this study, common food-borne pathogens Salmonella enterica Infantis, Escherichia coli, Listeria monocytogenes and Staphylococcus aureus were tested. Both NPs reduced viable cells with the log10 CFU reduction of 0.3–2.4 (PdNPs) and 0.8–2.0 (PtNPs), average inhibitory rates of 55.2–99% for PdNPs and of 83.8–99% for PtNPs. However, both NPs seemed to be less effective for biofilm formation and its reduction. The most effective concentrations were evaluated to be 22.25–44.5 mg/L for PdNPs and 50.5–101 mg/L for PtNPs. Furthermore, the interactions of tested NPs with bacterial cell were visualized by transmission electron microscopy (TEM). TEM visualization confirmed that NPs entered bacteria and caused direct damage of the cell walls, which resulted in bacterial disruption. The in vitro cytotoxicity of individual NPs was determined in primary human renal tubular epithelial cells (HRTECs), human keratinocytes (HaCat), human dermal fibroblasts (HDFs), human epithelial kidney cells (HEK 293), and primary human coronary artery endothelial cells (HCAECs). Due to their antimicrobial properties on bacterial cells and no acute cytotoxicity, both types of NPs could potentially fight food-borne pathogens.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial Properties of Palladium and Platinum Nanoparticles: A New Tool for Combating Food-Borne Pathogens

Chlumsky

Purkrtová

Míchová

et al. 2021

IJMS

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“…Eu 3+ -doped oxide thin films possess great potential for several emerging applications in optics, optoelectronics, and sensors, i.e., waveguides, display luminophores, imaging detectors, solar cells, and scintillators [1][2][3][4][5][6][7][8][9][10][11]. Eu 3+ was the dopant of choice in relation to the previously mentioned applications due to its strong emission in the visible part of spectra centered at around 612 nm [12].…”

Section: Introductionmentioning

confidence: 99%

“…As an example of well-known Eu 3 dopant host matrices we can mention semiconducting ZnO, TiO 2, and dielectric Lu 2 O 3 oxides. The Eu 3+ -doped thin films are fabricated by a variety of methods [1,2], e.g., ion implantation [13], plasmaenhanced chemical vapor deposition [3,4,14], electrochemical deposition [5], hydrothermal deposition [15,16], chemical bath deposition [6], spraying [17,18], sputtering [4,7,8,[19][20][21], evaporation [22,23], pulsed laser deposition (PLD) [24][25][26][27], matrix-assisted pulsed laser evaporation technique (MAPLE) [28], and sol-gel [9,10,[29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

In Situ Monitoring of Pulsed Laser Annealing of Eu-Doped Oxide Thin Films

et al. 2021

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Eu3+-doped oxide thin films possess a great potential for several emerging applications in optics, optoelectronics, and sensors. The applications demand maximizing Eu3+ photoluminescence response. Eu-doped ZnO, TiO2, and Lu2O3 thin films were deposited by Pulsed Laser Deposition (PLD). Pulsed UV Laser Annealing (PLA) was utilized to modify the properties of the films. In situ monitoring of the evolution of optical properties (photoluminescence and transmittance) at PLA was realized to optimize efficiently PLA conditions. The changes in optical properties were related to structural, microstructural, and surface properties characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The substantial increase of Eu3+ emission was observed for all annealed materials. PLA induces crystallization of TiO2 and Lu2O3 amorphous matrix, while in the case of already nanocrystalline ZnO, rather surface smoothening0related grains’ coalescence was observed.

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“…At present, there are two main methods to realize white light LED: the first is to package the chips that can emit red, green, and blue colors, respectively, and adjust them through certain means to make them mixed to emit white light [4,5] . The second is to use a combination of LED chips or diodes that can emit ultraviolet light and phosphors that can be effectively excited by ultraviolet light and emit red, green, and blue colors [6] . In addition, this method has simple process, low cost, and the obtained white light color temperature and color rendering coefficient are relatively high [7] .…”

Section: Introductionmentioning

confidence: 99%

“…[4,5] The second is to use a combination of LED chips or diodes that can emit ultraviolet light and phosphors that can be effectively excited by ultraviolet light and emit red, green, and blue colors. [6] In addition, this method has simple process, low cost, and the obtained white light color temperature and color rendering coefficient are relatively high. [7] Therefore, increasing the luminescence intensity of rare earth tricolor phosphor to improve the luminescence performance of LEDs has become a research focus all over the world.…”

Section: Introductionmentioning

confidence: 99%

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺

2021

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To enhance the luminous intensity of phosphors containing Tb 3 + , Gd 3 + was used as a sensitizing ion to recombine with Tb 3 + . Gd 3 + and Tb 3 + ions were loaded on the Al 2 O 3 aerogel matrix with nano porous structure via a simple and facile solgel method. After vacuum drying and calcination, Al 2 O 3 : Tb 3 + , Gd 3 + composite aerogel materials were obtained. Al 2 O 3 aerogel matrix has three-dimensional nanostructure and good chemical stability, which can provide stable crystal field and emission site for the rare earth activated ions. The results indicated that the introduction of Gd 3 + can effectively enhance the luminescence intensity of Al 2 O 3 : Tb 3 + at 543 nm under 260 nm UV excitation. The optimal ratio of Gd 3 + and Tb 3 + was determined to be 1: 1. The mechanism of Gd 3 + sensitization to Tb 3 + can be considered as electric multipole resonance transmission. We expected that this work could provide guidance for the development of enhancing the luminous intensity of green phosphors for lamp.

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Optical nanomaterials with focus on rare earth doped oxide: A Review

Cited by 67 publications

References 399 publications

Antimicrobial Properties of Palladium and Platinum Nanoparticles: A New Tool for Combating Food-Borne Pathogens

Antimicrobial Properties of Palladium and Platinum Nanoparticles: A New Tool for Combating Food-Borne Pathogens

In Situ Monitoring of Pulsed Laser Annealing of Eu-Doped Oxide Thin Films

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺

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Optical nanomaterials with focus on rare earth doped oxide: A Review

Cited by 67 publications

References 399 publications

Antimicrobial Properties of Palladium and Platinum Nanoparticles: A New Tool for Combating Food-Borne Pathogens

Antimicrobial Properties of Palladium and Platinum Nanoparticles: A New Tool for Combating Food-Borne Pathogens

In Situ Monitoring of Pulsed Laser Annealing of Eu-Doped Oxide Thin Films

Sensitization Mechanism of Alumina Aerogels: Introducing Gd3+ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb3+

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Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺