Multispeckle autocorrelation spectroscopy and its application to the investigation of ultraslow dynamical processes

Kirsch, Siegfried; Frenz, V.; Schärtl, Wolfgang; Bartsch, E.; Sillescu, H.

doi:10.1063/1.470761

Cited by 93 publications

(66 citation statements)

References 9 publications

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“…translational or rotational motion of the sample during the measurement, are necessary in order to obtain · · · E [29,[33][34][35]. Similar arguments hold for the role of nonergodicity in standard DLS experiments [47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 81%

“…For diluted, nonergodic samples several methods have been applied to properly average the data obtained in DLS experiments [47][48][49][50][51][52][53]. A good comparative review of some of these methods can be found in Refs.…”

Section: Dynamic Light Scattering By Nonergodic Mediamentioning

confidence: 99%

“…However, the method of Refs. [52] and [53] can be applied to study extremely slow dynamics in turbid systems where the above mentioned constraints do not apply [59].…”

Section: Dynamic Light Scattering By Nonergodic Mediamentioning

confidence: 99%

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Diffusing-wave spectroscopy of nonergodic media

et al. 2001

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We introduce an elegant method which allows the application of diffusing-wave spectroscopy (DWS) to nonergodic, solidlike samples. The method is based on the idea that light transmitted through a sandwich of two turbid cells can be considered ergodic even though only the second cell is ergodic. If absorption and/or leakage of light take place at the interface between the cells, we establish a so-called "multiplication rule", which relates the intensity autocorrelation function of light transmitted through the double-cell sandwich to the autocorrelation functions of individual cells by a simple multiplication. To test the proposed method, we perform a series of DWS experiments using colloidal gels as model nonergodic media. Our experimental data are consistent with the theoretical predictions, allowing quantitative characterization of nonergodic media and demonstrating the validity of the proposed technique.

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Section: Introductionmentioning

confidence: 81%

Section: Dynamic Light Scattering By Nonergodic Mediamentioning

confidence: 99%

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Diffusing-wave spectroscopy of nonergodic media

et al. 2001

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“…roughness) and slow material relaxation processes [1][2][3]. The use of speckle patterns to determine these properties presents an attractive avenue for the precise characterization of surfaces during laser materials processing using the existing sources of energy.…”

Section: Introductionmentioning

confidence: 99%

Utilizing dynamic laser speckle to probe nanoscale morphology evolution in nanoporous gold thin films

Ly¹,

Şeker²,

Matthews³

2016

Opt. Express

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This paper demonstrates the use of dynamic laser speckle autocorrelation spectroscopy in conjunction with the photothermal treatment of nanoporous gold (np-Au) thin films to probe nanoscale morphology changes during the photothermal treatment. Utilizing this spectroscopy method, backscattered speckle from the incident laser is tracked during photothermal treatment and both the characteristic feature size and annealing time of the film are determined. These results demonstrate that this method can successfully be used to monitor laserbased surface modification processes without the use of ex-situ characterization. ©2016 Optical Society of America

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“…speckle fluctuations on time scales from a fraction of second up to several hours. In the first implementations of these so-called multispeckle approaches [11,12], the far field detection scheme of traditional DLS was used and the intensity correlation function was calculated from…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging

Cipelletti¹,

Brambilla²,

Maccarrone³

et al. 2013

Opt. Express

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Abstract:The constituents of soft matter systems such as colloidal suspensions, emulsions, polymers, and biological tissues undergo microscopic random motion, due to thermal energy. They may also experience drift motion correlated over mesoscopic or macroscopic length scales, e.g. in response to an internal or applied stress or during flow. We present a new method for measuring simultaneously both the microscopic motion and the mesoscopic or macroscopic drift. The method is based on the analysis of spatio-temporal cross-correlation functions of speckle patterns taken in an imaging configuration. The method is tested on a translating Brownian suspension and a sheared colloidal glass.

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Multispeckle autocorrelation spectroscopy and its application to the investigation of ultraslow dynamical processes

Cited by 93 publications

References 9 publications

Diffusing-wave spectroscopy of nonergodic media

Diffusing-wave spectroscopy of nonergodic media

Utilizing dynamic laser speckle to probe nanoscale morphology evolution in nanoporous gold thin films

Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging

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