Development and characterization of fast responding pressure sensitive microspheres

Kimura, Fletcher; Rodríguez, Miguel; McCann, Jesse T; Carlson, Brenden; Dabiri, Dana; Khalil, Gamal; Callis, James B.; Xia, Younan; Gouterman, Martin

doi:10.1063/1.2952502

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…The optical microscopy images of the PS beads were taken using a confocal laser scanning microscope (Carl Zeiss, Thornwood, NY). The pressure and temperature responsiveness of the PS beads were measured using a dynamic flow system (the PMT survey apparatus) described in a prior publication . A mercury short arc lamp equipped with a band pass filter centered at 365 nm was used to excite the luminophors in these beads.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of Pressure and Temperature Dual‐Responsive Polystyrene Microbeads

Zhu

Deng

Zeng

et al. 2013

Part & Part Syst Charact

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A facile approach to the synthesis of pressure and temperature dual‐responsive polystyrene (PS) microbeads with controlled sizes via dispersion polymerization is described. Three different luminophors are selected and directly introduced into the reaction system and thus incorporated into the resultant PS microbeads during polymerization. By manipulating the reaction conditions, including concentrations of the initiator and monomer, polarity of the reaction medium, and injection rate for the monomer, uniform PS microbeads with sizes ranging from 1 to 5 μm are obtained. When a light source centered at 365 nm is used to excite all the luminophors in the PS beads, three distinct and resolvable emission peaks corresponding well with the luminophors are observed. By taking advantage of their sensitive responses to both pressure and temperature, the PS beads can be utilized for quantitative measurements of these two stimulations simultaneously. The PS beads loaded with multiple luminophors have the ability to serve as building blocks for the fabrication of novel sensing and imaging devices and therefore provide a promising strategy for the study of aerodynamics.

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Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of Pressure and Temperature Dual‐Responsive Polystyrene Microbeads

Zhu

Deng

Zeng

et al. 2013

Part & Part Syst Charact

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“…For reference, the response times of polystyrene microbeads (following previous procedures 25 are also included, which show that they are the largest response times, which is consistent with previous results. 1 The polystyrene and silica microbead response time comparison is also shown in Figure 4.…”

Section: B Response Time Resultsmentioning

confidence: 99%

“…[19][20][21] Hence, to develop a fast responding microbead, a compromise would have to be made between the thickness of the layer and the oxygen diffusion coefficient. Kimura et al 1 reported that the response times for 2 μm diameter polystyrene microbeads are estimated to range from 9.8 ms to 27.6 ms, which would be too slow for desired applications, such as measuring pressure changes in turbulent flows. This lead to initial research involving the synthesis of a new type of microbead using a highly porous silicon dioxide structure containing novel pressure-sensitive osmium complexes, with a much faster response time (Kimura et al 1 ).…”

Section: Introductionmentioning

confidence: 99%

“…Kimura et al 1 reported that the response times for 2 μm diameter polystyrene microbeads are estimated to range from 9.8 ms to 27.6 ms, which would be too slow for desired applications, such as measuring pressure changes in turbulent flows. This lead to initial research involving the synthesis of a new type of microbead using a highly porous silicon dioxide structure containing novel pressure-sensitive osmium complexes, with a much faster response time (Kimura et al 1 ). While successful, the osmiumbased silicon dioxide microbeads had a very low signal-tonoise ratio.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of multi-dye pressure-sensitive microbeads

Lacroix

Viraye-Chevalier

Seiter

et al. 2013

Review of Scientific Instruments

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The response times of pressure-sensitive particles to passing shockwaves were measured to investigate their ability to accurately determine pressure changes in unsteady flows. The particles tested were loaded with novel pressure-sensitive dyes such as Pt (II) meso-tetra(pentafluorophenyl)porphine, Pt(II) octaethylporphine, bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl))iridium III, and iridium(III) bis(4-phenylthieno[3,2-c] pyridinato-N,C2')acetylacetonate. For this work, porous silicon dioxide pressure-sensitive beads (PSBeads) were used. Two synthetic procedures were used to fabricate the particles. In the first, a one-step method loaded dyes during the synthesis of microbeads, in the second a two-step method synthesized the microbeads first, then loaded the dyes. The shock tube facility was used to measure the response times of microbeads to fast pressure jumps. The study involved testing multiple luminophors loaded in microbeads with various size distributions. Response times for the silica-based microbeads ranged between 26 μs and 462 μs (at 90% of the amplitude response), which are much faster than previously reported polystyrene-based microbead response times, which range from 507 μs to 1582 μs (at 90% of the amplitude response) [F. Kimura, M. Rodriguez, J. McCann, B. Carlson, D. Dabiri, G. Khalil, J. B. Callis, Y. Xia, and M. Gouterman, "Development and characterization of fast responding pressure sensitive microspheres," Rev. Sci. Instrum. 79, 074102 (2008)].

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“…Images of these pressure sensitive beads with a narrow particle size distribution can be seen in figure 15. The response time of conventional PSP film, the beads, and hollow porous silica micro spheres was also evaluated [119], and it was found that the response time of the silica spheres was two orders of magnitude shorter than that of the polystyrene beads, because no binder material was included in the hollow porous particles. Kim et al [114] fabricated oxygen sensitive particles with a diameter ranging from 2.2 to 3.9 µm using a dispersion polymerization method by synthesizing PtOEP with polystyrene.…”

Section: Dopant Dyes For Other Application (Partial Pressure Of Oxygen)mentioning

confidence: 99%

Particle-based temperature measurement coupled with velocity measurement

Someya

2020

Meas. Sci. Technol.

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This review article focuses on the simultaneous particle-based measurement of velocity and temperature. The thermographic PIV with phosphor particles is included in the scope. However, there are many other dye-doped particles that can be used in these methods, some of which are more suitable for measurements of liquid flow and low temperature flow.This review summarized the methods for fabrication, applications, optical properties, and limitations of temperature sensitive particles, and the extensive coverage of the field provided by this review renders it useful as a base for further experimentation. Dopant sensor molecules are also summarized in this review make it possible to fabricate functional particles that are suitable for the aims of an individual researcher. These particles are excited by a UV-laser and several kinds of them can be excited using a common green laser.Several approaches to velocity and temperature measurements, mono-color intensity-based method, the ratiometric method and the lifetime method are explained. The combined methods are limited by velocity conditions; therefore, decoupling the temperature measurement from the velocity measurement is sometimes reasonable. However, combined measurements were also considered in this review.There are many possible sources of error when using these methods; however, the most important factor is the following capacity of the particles, especially in gaseous flow. The deformation of particle images because of the long exposure inherent in the lifetime-based method was discussed quantitatively.Applications of liquid/gas/multiphase flow measurements were introduced. Micro capsules or microbeads are often used for a liquid flow and a microchannel flow. Many previous works use a phosphor for a high temperature gas flow. Uncertainties are different on a case-by-case basis. Accurate calibration is very important in suppressing errors. The development of easy calibration methods or calibration free methods while retaining high accuracy is an important issue in future work.

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Development and characterization of fast responding pressure sensitive microspheres

Cited by 10 publications

References 24 publications

Synthesis and Characterization of Pressure and Temperature Dual‐Responsive Polystyrene Microbeads

Synthesis and Characterization of Pressure and Temperature Dual‐Responsive Polystyrene Microbeads

Characterization of multi-dye pressure-sensitive microbeads

Particle-based temperature measurement coupled with velocity measurement

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