Single gold nanostars with multiple branches as multispectral orientation probes in single-particle rotational tracking

2021 ◽  
Vol 57 (26) ◽  
pp. 3263-3266
Author(s):  
Geun Wan Kim ◽  
Ji Won Ha
Keyword(s):  
Optical Properties ◽  
Single Particle ◽  
Correlation Study ◽  
Dark Field ◽  
Differential Interference Contrast ◽  
Particle Correlation ◽  
Gold Nanostars ◽  
Dic Microscopy

Herein, we performed a single-particle correlation study to characterize the optical properties of gold nanostars (AuNSs) with multiple sharp branches under dark-field (DF) and differential interference contrast (DIC) microscopy, and to examine their use as multispectral orientation probes.

Single-particle correlation study: chemical interface damping induced by biotinylated proteins with sulfur in plasmonic gold nanorods

2019 ◽  
Vol 21 (13) ◽  
pp. 7061-7066
Author(s):  
Seong Woo Moon ◽  
Ji Won Ha
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Single Particle ◽  
Localized Surface Plasmon Resonance ◽  
Correlation Study ◽  
Hot Electrons ◽  
Localized Surface Plasmon ◽  
Particle Correlation

Plasmonic gold nanoparticles can be an efficient source of hot electrons that can transfer to adsorbed molecules for photochemistry, followed by broadening of the homogeneous localized surface plasmon resonance (LSPR) linewidth.

Colloidal Plasmonic Nanostar Antennas with Wide Range Resonance Tunability

2019 ◽  
Author(s):  
Theodoros Tsoulos ◽  
Supriya Atta ◽  
Maureen Lagos ◽  
Michael Beetz ◽  
Philip Batson ◽  
...  
Keyword(s):  
Single Particle ◽  
Structural Complexity ◽  
Field Enhancement ◽  
Hot Electron ◽  
Structure Property ◽  
Plasmon Band ◽  
Gold Nanostars ◽  
Wide Range ◽  
Particle Level ◽  
Spectrally Resolved

<div>Gold nanostars display exceptional field enhancement properties and tunable resonant modes that can be leveraged to create effective imaging tags or phototherapeutic agents, or to design novel hot-electron based photocatalysts. From a fundamental standpoint, they represent important tunable platforms to study the dependence of hot carrier energy and dynamics on plasmon band intensity and position. Toward the realization of these platforms, holistic approaches taking into account both theory and experiments to study the fundamental behavior of these</div><div>particles are needed. Arguably, the intrinsic difficulties underlying this goal stem from the inability to rationally design and effectively synthesize nanoparticles that are sufficiently monodispersed to be employed for corroborations of the theoretical results without the need of single particle experiments. Herein, we report on our concerted computational and experimental effort to design, synthesize, and explain the origin and morphology-dependence of the plasmon modes of a novel gold nanostar system, with an approach that builds upon the well-known plasmon hybridization model. We have synthesized monodispersed samples of gold nanostars with finely tunable morphology employing seed-mediated colloidal protocols, and experimentally observed narrow and spectrally resolved harmonics of the primary surface plasmon resonance mode both at the single particle level (via electron energy loss spectroscopy) and in ensemble (by UV-Vis and ATR-FTIR spectroscopies). Computational results on complex anisotropic gold nanostructures are validated experimentally on samples prepared colloidally, underscoring their importance as ideal testbeds for the study of structure-property relationships in colloidal nanostructures of high structural complexity.</div>

Morphological Characterization of Wax and Surfactant–Encapsulated Microcrystalline Cellulose for Better Dispersion

2020 ◽  
Vol 70 (2) ◽  
pp. 226-231
Author(s):  
Qingzheng Cheng ◽  
Chengfeng Zhou ◽  
Yuanfeng Pan ◽  
Brian Via
Keyword(s):  
Microcrystalline Cellulose ◽  
Morphological Characterization ◽  
Fiber Bundles ◽  
Wood Composite ◽  
Differential Interference Contrast ◽  
Expensive Equipment ◽  
Fine Tune ◽  
Cellulose Composite ◽  
Dic Microscopy

Abstract Encapsulation of cellulose with wax and surfactant is a physical way to restrict cellulose-to-cellulose attraction. Because wax is often used in the wood composite process, industrial manufacturers would not have to upgrade or add expensive equipment to handle cellulose addition. The encapsulated cellulose particles could easily be transported to composite and polymer facilities and blended in a homogeneous fashion for a multitude of products and composites. It was the objective of this study to utilize differential interference contrast (DIC) microscopy to characterize the wax and surfactant coverage and encapsulation morphology of the wax–surfactant–cellulose composite. The lengths and widths of the cellulose particles were significantly changed after encapsulation. DIC microscopy found that we could fine-tune wax coverage to control homogeneity and reduce fiber bundling during dispersion. It was found that surfactants were not necessary to enhance coverage if a 1:4 ratio of wax to microcrystalline cellulose was used. However, if more wax is desired, then surfactants may be necessary to suppress fiber bundles during dispersion.

scholarly journals Correlation Study of Structural and Optical Properties of ZnO/PTAA Hybrid Heterojunction Layer

2019 ◽  
Vol 1358 ◽  
pp. 012045
Author(s):  
Abdul Ismail Abdul Rani ◽  
Ghosh Bablu Kumar ◽  
Khairul Anuar Mohamad ◽  
Mohd Shahril Osman ◽  
Fuei Pien Chee ◽  
...  
Keyword(s):  
Optical Properties ◽  
Correlation Study ◽  
Structural And Optical Properties

Pulsed-laser deposition growth of SBN and correlation study of structure and optical properties

2000 ◽  
Author(s):  
Felix E. Fernandez ◽  
Yelitza Gonzalez ◽  
Huimin Liu ◽  
Edgardo Rodriguez ◽  
Victor Rodriguez ◽  
...  
Keyword(s):  
Optical Properties ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Correlation Study ◽  
Laser Deposition
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