The Analysis System of Ultrafine Particles Dynamic Light Scattering Signals Based on B/S Mode

2010 ◽  
Vol 121-122 ◽  
pp. 172-176
Author(s):  
Zhen Mei Li ◽  
Jin Shen ◽  
Wei Liu ◽  
Wen Ge Li
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Power Spectrum ◽  
Real Time ◽  
Virtual Instrument ◽  
Ultrafine Particles ◽  
Scattered Light ◽  
The Real ◽  
Time Frequency ◽  
Analysis System

By integrating network technology, virtual instrument technology, video image network transmission and web page fusion technology, the analysis system of ultrafine particles dynamic light scattering signals based on B/S mode was developed，Through internet explorer, the remote client can browse the real-time monitoring data, such as diameters of particles, the autocorrelation function curve, inversion results, power spectrum density, time-frequency distribution. The photon counting technology was applied in the system to replace the expensive correlator, the real-time data of ultrafine particles dynamic light scattering were analyzed by using Burg arithmetic of AR model, Much useful information of the particle size can be obtained by comparing the power spectrum of standard polystyrene particles scattered light signals of 450nm, 300nm, 200nm.

Development of the Measurement and Analysis System of Nanoparticles Size Distribution

2010 ◽  
Vol 121-122 ◽  
pp. 168-171 ◽  
Author(s):  
Zhen Mei Li ◽  
Wen Ge Li ◽  
Jin Shen ◽  
Wei Liu
Keyword(s):  
Light Scattering ◽  
Size Distribution ◽  
Virtual Instrument ◽  
High Speed ◽  
Photon Counting ◽  
Peak Position ◽  
Time Data ◽  
The Real ◽  
Measurement And Analysis ◽  
Analysis System

The measurement and analysis system of nanoparticles size distribution was developed by using virtual instrument technology, while the photon counting technology was applied in the system to replace the expensive correlator. High speed photon pulse counter was designed. The real-time data of nanoparticles dynamic light scattering were analyzed in the mixed program of MATLAB and LabVIEW, where the time autocorrelation functions of nanoparticles light scattering signals of monodisperse and polydisperse are reversed by NNLS arithmetic. Experiments results show that the peak position, peak width and symmetry of inverse distribution are very close to the real simulate particles.

scholarly journals Ferro-self-assembly: magnetic and electrochemical adaptation of a multiresponsive zwitterionic metalloamphiphile showing a shape-hysteresis effect

2021 ◽  
Vol 12 (1) ◽  
pp. 270-281
Author(s):  
Stefan Bitter ◽  
Moritz Schlötter ◽  
Markus Schilling ◽  
Marina Krumova ◽  
Sebastian Polarz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Real Time ◽  
Self Assembly ◽  
Hysteresis Effect ◽  
The Self ◽  
Self Organization ◽  
Stimuli Responsive ◽  
Optical Birefringence

The self-organization properties of a stimuli responsive amphiphile can be altered by subjecting the paramagnetic oxidized form to a magnetic field of 0.8 T and monitored in real time by coupling optical birefringence with dynamic light scattering.

Sequential Extraction of Late Exponentials (SELE): A technique for deconvolving multimodal correlation curves in Dynamic Light Scattering

MRS Advances ◽  
2020 ◽  
Vol 5 (17) ◽  
pp. 865-880 ◽  
Author(s):  
Preethi L Chandran
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Sequential Extraction ◽  
Time Scales ◽  
Scattered Light ◽  
Correlation Spectroscopy ◽  
Least Square ◽  
Multiple Time Scales ◽  
Multiple Time ◽  
Correlation Curve

Abstract:In techniques such as Dynamic Light Scattering (DLS), Fluorescence Correlation Spectroscopy, and image mining, motion is tracked by the autocorrelation of a signal over logarithmic time scales. For instance the tracking signal in DLS is the scattered light intensity; it remains correlated at time scales where scant changes in the arrangement of the scattering particles occur, but decays exponentially at the time scales of their diffusion. When there are multiple time scales of motion (for instance due to scatterers of different sizes), the correlation curve has more than one exponential fall. Extracting the decay constants or hydrodynamic sizes due to each exponential fall in a multi-species field correlation curve becomes an ill-conditioned mathematical problem. We describe a new algorithm to invert a multi-modal correlation curve by Sequential Extraction of the Late Exponentials (SELE). The idea is that while the inversion of a multi-exponential equation may be ill posed, that of a single exponential is not. So we fit data windows towards to base of the correlation curve to extract the largest contribution species, remove the species contribution from the correlation curve, and repeat the process with the remnant curve. The single exponent can be robustly fitted by least-square minimization with initial guesses generated by an adapted cumutant technique (power-series) that includes stretch coefficients (measure of sample dispersity). The proposed algorithm resolves particle sizes separated by 3X, and is reliable against fluctuations in the correlation curve and to localized regions of suboptimal data. The algorithm can be used to track particle dynamics in solution in multi-species problems such as self-assembly.

scholarly journals FPGA-based real-time autocorrelator and its application in dynamic light scattering

Optik ◽  
2019 ◽  
Vol 194 ◽  
pp. 163047
Author(s):  
Akhmarzhan Islambek ◽  
Kecheng Yang ◽  
Wei Li ◽  
Kai Li
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Real Time

Design of Temperature Acquisition and Analysis System Based on LABVIEW

2013 ◽  
Vol 816-817 ◽  
pp. 762-765
Author(s):  
Li Mei Wen ◽  
Min Ma
Keyword(s):  
Software Development ◽  
Real Time ◽  
Virtual Instrument ◽  
Environmental Temperature ◽  
Temperature Sensors ◽  
Development Platform ◽  
Labview Software ◽  
New Ideas ◽  
Instrument Technology ◽  
Analysis System

The introduction of the virtual instrument technology provides new ideas for the developments of the temperature acquisition. This paper presents the design of temperature acquisition system based on VI technology. This system takes LABVIEW as the software development platform, simulating environmental temperature parameters via temperature sensors and heaters. Through the USB-6009 data collecting cards environmental temperature is sent to LABVIEW software platform for analysis. The system has the functions of data acquisition, display, storage, callback, save, analysis, printing statements and limit alarm processing and so on, and completes the real-time collection and analysis of the temperature.

Effective suppression of multiply scattered light in static and dynamic light scattering

1998 ◽  
Vol 37 (27) ◽  
pp. 6511 ◽  
Author(s):  
Lisa B. Aberle ◽  
Peter Hülstede ◽  
Simone Wiegand ◽  
Wolffram Schröer ◽  
Wilfried Staude
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Scattered Light ◽  
Effective Suppression

scholarly journals SPECTROSCOPIC METHOD FOR EVALUATING THE QUALITY OF A SOLVENT IN GEL-FORMING FIBERS

2021 ◽  
pp. 87-93
Author(s):  
Алена Игорьевна Маркова ◽  
Александр Викторович Соколов ◽  
Светлана Дмитриевна Хижняк ◽  
Павел Михайлович Пахомов
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Size Distribution ◽  
Optical Spectroscopy ◽  
Scattered Light ◽  
Spectroscopic Method ◽  
Average Size ◽  
Ultra High Molecular Weight

Предложен метод оптической спектроскопии для оценки качества растворителя, на примере вазелинового масла (ВМ), используемого при гель-формованиии сверхвысокомолекулярного полиэтилена (СВМПЭ). Метод основан на анализе упруго рассеянного света от частиц загрязнителя в ВМ. С помощью этого метода удалось определить средний размер рассеивающих частиц и их распределение по размерам. Методы динамического светорассеяния (ДСР) и оптической микроскопии подтвердили данные о среднем размере частиц загрязнителя в ВМ и их распределении по размерам, полученные методом оптической спектроскопии. A method of optical spectroscopy for evaluating the quality of a solvent is proposed, using the example of vaseline oil (VM) used in gel molding of ultra-high molecular weight polyethylene (UHMWPE). The method is based on the analysis of elastically scattered light from pollutant particles in a VM. Using this method, it was possible to determine the average size of scattering particles and their size distribution. The methods of dynamic light scattering (DLS) and optical microscopy have confirmed the data on the average size of pollutant particles in VM and their size distribution obtained by optical spectroscopy.

Sign in / Sign up

Export Citation Format

Share Document