Pressure-/Temperature-Sensitive Paints (PSP / TSP)

The pressure- and temperature-sensitive paint (PSP/TSP) technique enable us to measure the pressure/temperature distribution on the surface, to which the PSP/TSP layer is applied, based on the oxygen/thermal quenching of luminescence. We are working on the development and improvement of the PSP/TSP techniques.

High Knudsen number micro flows

In order to apply PSP to micro-gas flow, we have developed pressure-sensitive molecular film (PSMF) with ordered molecular assemblies using the Langmuir-Blodgett method. The surface roughness of PSMF is O(1 nm); thus, the effect of the PSMF on the micro-flow field is vanishingly small. The pressure distribution in a micro-nozzle is successfully measured by using PSMF. Since the microchannel is often made of PDMS (poly (dimethylsiloxane)), we developed micro-channel named pressure-sensitive channel chip (PSCC) which itself works as pressure sensor. PSCC is fabricated with PDNS containing a pressure-sensitive dye.

Pressure distribution in micro nozzle measured by PSCC


  • Y. Matsuda, H. Mori, Y. Sakazaki, T. Uchida, S. Suzuki, H. Yamaguchi, T. Niimi, Extension and characterization of pressure-sensitive molecular film, Experiments in Fluids, 47, 1025-1032 (2009)
  • Y. Matsuda, T. Uchida, S. Suzuki, R. Misaki, H. Yamaguchi, T. Niimi, Pressure-sensitive molecular film for investigation of micro gas flows, Microfluidics and Nanofluidics, 10, 165-171 (2011 )
  • Y. Matsuda, R. Misaki, H. Yamaguchi, T. Niimi, Pressure-sensitive channel chip for visualization measurement of micro gas flows, Microfluidics and Nanofluidics, 11, 507-511 (2011)

Research Grant

  • Multidimensional and Multivariable Combined Simultaneous Measurement on High Knudsen Number Micro Flows, Grant-in-Aid for Scientific Research (A), Project number 21246034, 2009.04-2012.03.
  • Development of smart micro-channel with functional molecular sensor, Grant-in-Aid for Challenging Exploratory Research, Project number 23656132, April 2011-March 2014
  • Showa Hokokai Foundation, April 2009-March 2010
  • Toyota Physical and Chemical Research Institute, 2013.04-2014.03.

PSP / TSP combined sensor using inkjet printer

The main error source of the PSP measurement is the temperature dependence of PSP. Therefore, to improve the accuracy of the PSP measurement, it is necessary to simultaneously measure the temperature distribution by TSP and correct the influence of the temperature distribution. Mixture sensors were developed by simply mixing the solution of PSP and TSP. However, the degradations of the properties were reported such as degradation of photostability under an illumination and reduction of emission intensity.

We proposed the dual PSP and TSP sensor fabricated by an inkjet printer. By using an inkjet printer, PSP and TSP are printed with high precision (in general, PSP / TSP is manually applied to a surface using an airbrush). The dual PSP and TSP sensor avoids the interaction between the two luminophores by consisting of tiny discrete dot arrays of PSP and TSP.

Inkjet printer for making PSP / TSP combined sensor
PSP / TSP applied to white plate in the center using different nozzles

This research is a joint research with Professor Yasuhiro Egami, Department of Mechanical Engineering, Aichi Institute of Technology.


  • T. Kameya, Y. Matsuda, Y. Egami, H. Yamaguchi, T. Niimi, Dual luminescent arrays sensor fabricated by inkjet-printing of pressure- and temperature-sensitive paints, Sensors and Actuators B: Chemical 190, 70 -77 (2014)
  • Y. Matsuda, T. Kameya, Y. Suzuki, Y. Yoshida, Y. Egami, H. Yamaguchi, T. Niimi, Fine printing of pressure-and temperature-sensitive paints using commercial inkjet printer, Sensors and Actuators B: Chemical, Vol. 250, 563-568 (2017)
  • T. Kameya,Y. Matsuda, Y. Egami, H. Yamaguchi, T. Niimi, Combined Pressure-/Temperature-Sensitive Paint Arranged in Dot Array, Transactions of the Japan Society of Mechanical Engineers Series B 78 (791), 1327-1335 (2012)
  • J. Ueyama, H. Furukawa, T. Kameya, Y. Matsuda, H. Yamaguchi, T. Niimi, Y. Egami, Investigation of inkjet printing conditions for microdot pressure-sensitive sensor on anodized aluminum substrate, Transactions of the JSME, 80, FE0040 / 1-13 (2014)

Research Award

  • Japan Society of Mechanical Engineers Award (paper), 2015, Japan Society of Mechanical Engineers

Research Grant

  • Ono Acoustics Research Grants, April 2015-March 2016

PSP measurement using heterodyne detection method

We proposed the PSP technique based on the heterodyne method for the precise pressure measurement of periodic flow fields. By detecting the beat signal that results from interference between a modulating illumination light source and a pressure fluctuation, only the signal at the frequency of interest can be detected without the noise signals at other frequencies. As a demonstration of this method, the pressure fluctuations in a resonance tube at the fundamental, second, and third harmonics were successfully measured.

Pressure fluctuation distribution in the air column resonance tube
(Basic vibration, double vibration, triple vibration from the top)


  • Y. Matsuda, D. Yorita, Y. Egami, T. Kameya, N. Kakihara, H. Yamaguchi, K. Asai, T. Niimi, Unsteady pressure-sensitive paint measurement based on the heterodyne method using low frame rate camera, Review of Scientific Instruments 84, 105110 (2013)

Research Grant

  • The pressure-sensitive paint technique based on the heterodyne method for a precise pressure measurement, Grant-in-Aid for Challenging Exploratory Research, Project number 25630050, April 2013-March 2015
  • Kawai Found for Sound Technology and Music, April 2013-March 2014

Other themes related to PSP / TSP

We are also studying the following projecs: pressure distribution measurement inside HDD using temperature-independent PSP, application of PSP / TSP to gas-liquid two-phase flow, and PSP based on organic EL devices (electroluminescent pressure sensor; ELPS), etc.


  • T. Kameya, Y. Matsuda, H. Yamaguchi, Y. Egami, T. Niimi, Pressure Distribution Measurement on a Rotating Disk Surface by Pressure-Sensitive Paint, Transactions of the Japan Society of Mechanical Engineers, C, 76 (771), 3002-3007 (2010)
  • Y. Matsuda, F. Nagashima, H. Yamaguchi, Y. Egami, T. Niimi, Unsteady 2D measurement of dissolved oxygen distribution using luminescent sensor film, Sensors and Actuators B: Chemical, 160 (1), 1464-1467 (2011)
  • T. Kameya, Y. Matsuda, H. Yamaguchi, Y. Egami, T. Niimi, Pressure-sensitive paint measurement on co-rotating disks in a hard disk drive, Optics and Lasers in Engineering, 50, 82-86 (2012)
  • Y. Matsuda, K. Ueno, H. Yamaguchi, Y. Egami, T. Niimi, Organic Electroluminescent Sensor for Pressure Measurement, Sensors, 12 (10), 13899-13906 (2012)

Related Awards

  • Japan Society of Mechanical Engineers Award (paper), 2012, Japan Society of Mechanical Engineers

Research Grant

  • Grant-in-Aid for Challenging Exploratory Research, Project number 21656052, April 2009 to March 2011
  • Measurements of Micro Scale Gas-Liquid Two Phase Flows, Grant-in-Aid for Young Scientists (B), Project Number 21760124, April 2009-March 2011
  • Murata Science Foundation, August 2010-July 2011
  • Takahashi Industrial and Economic Research Foundation, April 2012-March 2013
  • Casio Science Promotion Foundation, October 2013-September 2014
  • Tonen General Sekiyu Research / Development Encouragement & Scholarship Foundation, 2016
  • The Ebara Hatakeyama Memorial Foundation, 2017
  • The Iwatani Naoji Foundation, 2018
  • Gran-in-Aid, Challenging Research (Exploratory), Project number 18K18822, challenging research, 2018-2020
  • High precision measurement technique based on compressed sensing for aerodynamic testing, JST PRESTO, 2018-

Single Molecule Tracking

We investigate transport phenomena in microscopic environment (pores in catalysts, polymer membranes, etc.) using single molecule tracking (SMT). We also study on the post processing method of the trajectory data obtained by SMT: detection method of the hydrodynamic anisotropy of probe molecules and a state transition estimation method for the trajectories using machine learning. SMT is a measurement method that enables us to measure molecular scale thermal properties by tracking and analyzing the thermal motion of each probe molecule.

Example of SMT measurement result
Upper: Example of SMT image
Lower: Example of single particle trajectory


  • Y Matsuda, I Hanasaki, R Iwao, H Yamaguchi, T Niimi, Faster convergence of diffusion anisotropy detection by three-step relation of single-particle trajectory, Analytical chemistry 88 (8), 4502-4507 (2016)
  • Y. Matsuda, I. Hanasaki, R. Iwao, H. Yamaguchi, T. Niimi, Estimation of diffusive states from single-particle trajectory in heterogeneous medium using machine-learning methods, Physical Chemistry Chemical Physics, Vol. 20, 24099-24108 (2018)

Research Grant

  • Daiko Foundation, October 2015-March 2017
  • JGC-S Scholarship Research Grant, September 2015-September 2016
  • Asahi Glass Foundation, 2017-2019
  • Grant-in-Aid for Scientific Research (B), Project Number 16H04277, April 2016-March 2019
  • Grant-in-Aid for Scientific Research (B), Project Number 19H02086, April 2019-March 2022

Paper-Based Analytical Device

Paper-based analytical devices (PADs) have received much attention, because PADs are cost efficient, disposable, and portable. Though there have been many studies developing new design prototype devices and fabrication techniques, there have been minimal studies developing new thermofluid control techniques due to limited PAD resources. We propose the use of inkjet-printed electronic circuits as heaters for valves, concentrators, and heat sources for chemical reactions on PADs.

Inkjet printed electric circuit and PAD


  • Y. Matsuda, S. Shibayama, K. Uete, H. Yamaguchi, T. Niimi, Electric conductive pattern element fabricated using commercial inkjet printer for paper-based analytical devices, Analytical Chemistry, 87, 5762-5765 (2015)
  • Y. Matsuda, K. Sakai, H. Yamaguchi, T. Niimi, Electrophoretic Separation on an Origami Paper-Based Analytical Device Using a Portable Power Bank, Sensors 19 (7), 1724 (2019)

Research Grant

  • Improvement of paper-based analytical device by combining inkjet electric circuits printing technique, Grant-in-Aid for Challenging Exploratory Research, Project Number 16K14156, challenging research, April 2016-March 2018
  • Sumitomo Foundation, 2015

Physics of Granular Materials

There are many granular materials around us, such as medicine, food, cosmetics, pollen, rice, flour, and gravel. A lot of phenomena of granular materials remains still mystery. We investigate the low speed impact on a granular bed by a sphere (liquid / gel) and especially focused on the resultant crater diameter.

Liquid sphere impacts on granular bed


  • Y. Matsuda, S. Fukui, R. Kamiya, H. Yamaguchi, T. Niimi, Impact cratering on a granular bed by hydrogel spheres having intermediate property between solid and liquid, Physical Review E 99 (3), 032906 (2019)

Research Grant

  • Inamori Foundation, April 2015-March 2016
  • Hibi Science Foundation, 2018
  • Hosokawa Powder Technology Foundation, 2018



〒169-8555 東京都新宿区大久保3-4-1

e-mail : y.matsuda[at]waseda.jp

Waseda University Department of Modern Mechanical Engineering

Matsuda Laboratory

3-4-1, Okubo, Shinjyuku-ku, Tokyo, Japan, 169-8555

e-mail : y.matsuda[at]waseda.jp

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