Tracking Underpotential Deposition of Copper on Individual Silver Nanocubes by Real-Time Single-Particle Plasmon Scattering Imaging

2020 ◽  
Vol 124 (37) ◽  
pp. 20398-20409
Author(s):  
Hyuncheol Oh ◽  
Youngchan Park ◽  
Hyunjoon Song
Keyword(s):  
Real Time ◽  
Single Particle ◽  
Underpotential Deposition ◽  
Silver Nanocubes ◽  
Particle Plasmon

Single Particle Plasmon Spectroscopy of Silver Nanowires and Gold Nanorods

Nano Letters ◽  
2008 ◽  
Vol 8 (10) ◽  
pp. 3200-3204 ◽  
Author(s):  
Moussa NʼGom ◽  
Jan Ringnalda ◽  
John F. Mansfield ◽  
Ashish Agarwal ◽  
Nicholas Kotov ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Single Particle ◽  
Silver Nanowires ◽  
Particle Plasmon

scholarly journals Real-Time 3D Single Particle Tracking: Towards Active Feedback Single Molecule Spectroscopy in Live Cells

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2826 ◽  
Author(s):  
Shangguo Hou ◽  
Courtney Johnson ◽  
Kevin Welsher
Keyword(s):  
Fluorescence Spectroscopy ◽  
Real Time ◽  
Temporal Resolution ◽  
Single Molecule ◽  
Particle Tracking ◽  
Single Particle ◽  
Single Particle Tracking ◽  
Single Molecule Fluorescence ◽  
Single Molecule Fluorescence Spectroscopy ◽  
Active Feedback

Single molecule fluorescence spectroscopy has been largely implemented using methods which require tethering of molecules to a substrate in order to make high temporal resolution measurements. However, the act of tethering a molecule requires that the molecule be removed from its environment. This is especially perturbative when measuring biomolecules such as enzymes, which may rely on the non-equilibrium and crowded cellular environment for normal function. A method which may be able to un-tether single molecule fluorescence spectroscopy is real-time 3D single particle tracking (RT-3D-SPT). RT-3D-SPT uses active feedback to effectively lock-on to freely diffusing particles so they can be measured continuously with up to photon-limited temporal resolution over large axial ranges. This review gives an overview of the various active feedback 3D single particle tracking methods, highlighting specialized detection and excitation schemes which enable high-speed real-time tracking. Furthermore, the combination of these active feedback methods with simultaneous live-cell imaging is discussed. Finally, the successes in real-time 3D single molecule tracking (RT-3D-SMT) thus far and the roadmap going forward for this promising family of techniques are discussed.

Robust real-time 3D single-particle tracking using a dynamically moving laser spot

2017 ◽  
Vol 42 (12) ◽  
pp. 2390 ◽  
Author(s):  
Shangguo Hou ◽  
Xiaoqi Lang ◽  
Kevin Welsher
Keyword(s):  
Real Time ◽  
Particle Tracking ◽  
Single Particle ◽  
Single Particle Tracking ◽  
Laser Spot

Effect of Size, Shape, Composition, and Support Film on Localized Surface Plasmon Resonance Frequency: A Single Particle Approach Applied to Silver Bipyramids and Gold and Silver Nanocubes

2009 ◽  
Vol 1208 ◽  
Author(s):  
Emilie Ringe ◽  
Jian Zhang ◽  
Mark R. Langille ◽  
Kwonnam Sohn ◽  
Claire Cobley ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Single Particle ◽  
Localized Surface Plasmon ◽  
Correlation Technique ◽  
Ensemble Averaging ◽  
Nanophotonic Devices ◽  
Silver Nanocubes ◽  
Transmission Electron ◽  
Function Relationship ◽  
Relationship Of

AbstractLocalized surface plasmon resonances (LSPR), collective electron oscillations in nanoparticles, are being heavily scrutinized for applications in chemical and biological sensing, as well as in prototype nanophotonic devices. This phenomenon exhibits an acute dependence on the particle’s size, shape, composition, and environment. The detailed characterization of the structure-function relationship of nanoparticles is obscured by ensemble averaging. Consequently, single-particle data must be obtained to extract useful information from polydisperse reaction mixtures. Recently, a correlated high resolution transmission electron microscopy (HRTEM) LSPR technique has been developed and applied to silver nanocubes. We report here a second generation of experiments using this correlation technique, in which statistical analysis is performed on a large number of single particles. The LSPR dependence on size, shape, material, and environment was probed using silver right bipyramids, silver cubes, and gold cubes. It was found that the slope of the dependence of LSPR peak on size for silver bipyramids increases as the edges become sharper. Also, a plasmon shift of 96 nm was observed between similar silver and gold cubes, while a shift of 26 nm was observed, for gold cubes, between substrates of refractive index (RI) of 1.5 and 2.05.

Photoinduced mass transfer of azo polymers from micrometer to submillimeter studied by a real-time single particle strategy

Soft Matter ◽  
2020 ◽  
Vol 16 (42) ◽  
pp. 9746-9757
Author(s):  
Hao Huang ◽  
Chen Zhang ◽  
Jiaxing Lan ◽  
Zenan Wang ◽  
Xiaogong Wang
Keyword(s):  
Mass Transfer ◽  
Real Time ◽  
Particle Tracking ◽  
Single Particle ◽  
Single Particle Tracking ◽  
Azo Polymers ◽  
Tracking Strategy

This article reports a real-time single particle tracking strategy to investigate the photoinduced mass transfer of azo polymers and the results.

scholarly journals Fluorescence calibration method for single-particle aerosol fluorescence instruments

2017 ◽  
Vol 10 (5) ◽  
pp. 1755-1768 ◽  
Author(s):  
Ellis Shipley Robinson ◽  
Ru-Shan Gao ◽  
Joshua P. Schwarz ◽  
David W. Fahey ◽  
Anne E. Perring
Keyword(s):  
Real Time ◽  
Ammonium Sulfate ◽  
Fluorescence Detection ◽  
Single Particle ◽  
Calibration Method ◽  
Particle Mass ◽  
The Other ◽  
Limits Of Detection ◽  
The Relationship ◽  
Measurement Campaigns

Abstract. Real-time, single-particle fluorescence instruments used to detect atmospheric bioaerosol particles are increasingly common, yet no standard fluorescence calibration method exists for this technique. This gap limits the utility of these instruments as quantitative tools and complicates comparisons between different measurement campaigns. To address this need, we have developed a method to produce size-selected particles with a known mass of fluorophore, which we use to calibrate the fluorescence detection of a Wideband Integrated Bioaerosol Sensor (WIBS-4A). We use mixed tryptophan–ammonium sulfate particles to calibrate one detector (FL1; excitation  =  280 nm, emission  =  310–400 nm) and pure quinine particles to calibrate the other (FL2; excitation  =  280 nm, emission  =  420–650 nm). The relationship between fluorescence and mass for the mixed tryptophan–ammonium sulfate particles is linear, while that for the pure quinine particles is nonlinear, likely indicating that not all of the quinine mass contributes to the observed fluorescence. Nonetheless, both materials produce a repeatable response between observed fluorescence and particle mass. This procedure allows users to set the detector gains to achieve a known absolute response, calculate the limits of detection for a given instrument, improve the repeatability of the instrumental setup, and facilitate intercomparisons between different instruments. We recommend calibration of single-particle fluorescence instruments using these methods.

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