[11/10] The 40th “AIMR Tea Time Talk”



Prof. Masahiro Yoshimura
(National Cheng Kung University)


Why Soft,Solution Processing(=Low-EnergyProduction) of Advanced Nano-Materials is Difficult but Necessary for Sustainable Society?


November 10 (Thu.), 2022 16:00-17:00 on Japan Time


Online (Zoom)


Modern our society has been developed with various advanced nano-materials. Most of advanced materials, Metallurgical materials, Semiconductors, Ceramic materials and Plastics have been used in wide area of applications like structural, mechanical, chemical, electrical, electronic, optical, photonic, biological, medical, etc. Most of them except for bio-polymers & bio-minerals have never been produced via biological systems. Thus they have generally been fabricated artificially and/or industrially by so-called high-technology, where high temperature, high pressure, vacuum, molecule, atom, ion, plasma, etc. have been used for their fabrications, then consumed huge amount of resources and energies thus exhausted huge amounts of wastes: materials, heats and entropy. To save this tragedy, we must consider “Cascade use of Heats”, and “Low energy Production of advanced nano-materials via water-based industries.” Bio-inspired process, which mean that “Learn from Bio-systems then Exceed them” and/or exceed “Green Technology mostly based upon Bio-systems”. They should also be necessary for SDGs (Sustainable Developing Goals.)

We have challenged to fabricate those advanced inorganic materials with desired shape/size/location,etc. directly in low energetic routes using aqueous solutions since 1989 when we found a method to fabricate BaTiO3 film on Ti substrate in a Ba(OH)2 solution by Hydrothermal Electrochemical[HEC] method at low temperatures of 60-200 C. We proposed in 1995 an innovative concept and technology, “Soft Processing” or “Soft Solution Processing,” which aims low energetic (=environmentally friendly) fabrication of shaped, sized, located, and oriented inorganic materials in/from solutions1,2). It can be regarded as green processing, or eco-processing. When we have activated/stimulated interfacial reactions locally and/or moved the reaction point dynamically, we can get patterned ceramic films directly in solution without any firing, masking nor etching. Direct Patterning of CdS, PbS and CaWO4 on papers by Ink-Jet Reaction method. Furthermore, we have succeeded to fabricate BaTiO3 patterns on Ti by a laser beam scanning3) and carbon patterns on Si by plasma using a needle electrode scanning directly in solutions4). Successes in TiO2 and CeO2 patterns by Ink-Jet Deposition, where nano-particles are nucleated and grown successively on the surface of substrate thus become dense even below 300 C will be presented. Nano-structured films will be also talked. .A recent novel subject, Soft Processing for various nano-carbons including Graphene, functionalized Graphene and Mxene will be introduced. Where we have succeeded to prepare functionalized Graphene Ink via successive processes under ambient temperature and pressure conditions.5-8) In addition we propose Heat cascades for Materials Fabrication to elliminate wastes (Heat and materials =Entropy).

  • MRS Bulletin,25 [9], Sept. issue 2000, special issue for Soft Processing of Advanced Inorganic Materials, Guest Editor: M. Yoshimura and J. Livage.
  • Yoshimura, M., J. Mater. Sci.,41 [5],1299-1306 (2006), 43 [7] 2085-2103 (2008).
  • Watanabe, T., Yoshimura, M., et al. Carbon, 44,799-802 (2006).
  • Watanabe, T., Yoshimura, M., et al., Thin Solid Film, 515,2696-2699 (2006).
  • J. Senthilnathan, M. Yoshimura et al., J. Mater Chem A, (2014) 2, 3332-3337 (2015).
  • Sanjeeva Rao, K and Yoshimura, M et al. Adv. Funct. Mater., 25, 298-305 (2015).
  • E. Satheeshkumar, Y. Gogotsi, M. Yoshimura, et al. Sci, Repts, 6,1-9 (2016).
  • E. Satheeshkumar, J.R. Rombardi, M. Yoshimura, Materials Advances,1,146 (2020).

About Tea Time Talk

AIMR’s Tea Time Talk is a kind of seminar aiming to promote exchange between world’s eminent researchers and young researchers at AIMR, held in a relaxed atmosphere at AIMR’s Friday Tea Time. The following researchers from around the world have given talks at this event so far, and participants have enjoyed discussion over a cup of tea.

40th Nov. 10, 2022 Prof. Masahiro Yoshimura (National Cheng Kung University, Taiwan)
39th June 17, 2022 Prof. Rana Mohtadi (Toyota Research Institute of North America)
38th June 17, 2022 Prof. Michael Hirscher (Max-Planck-Institute for Intelligent Systems, Germany)
37th June 3, 2022 Prof. Reiko Oda (French National Centre for Scientific Research)
36th May 28, 2021 Prof. Magda Titirici (Imperial College London, U.K.)
35th Mar. 26, 2021 Prof. Yaroslav Blanter (Kavli Institute of Nanoscience, Delft University of Technology)
34th Oct. 23, 2020 Dr. Kazuhito Tsukagoshi (PI:WPI-MANA, NIMS & AIMR)
33rd July 17, 2020 Prof. Kaoru Tamada (IMCE, Kyushu University & AIMR)
32nd Jan. 17, 2020 Prof. Miho Yamauchi (I2CNER / Kyushu University & AIMR)
31st Jan. 17, 2020 Prof. Mickaël Lallart (INSA Lyon, Université de Lyon)
30th Oct. 25, 2019 Assoc. Prof. Frédéric Gillot (Department of Solid Mechanics, Mechanical Eng. and Civil Eng., École Centrale de Lyon)
29th July 12, 2019 Prof. Qian Niu (Department of Physics, The University of Texas at Austin)
28th May 17, 2019 Prof. Damien Fabrègue (INSA Lyon, France / ELyT MaX Lab at Tohoku University)
27th Dec. 14, 2018 Prof. Yukitoshi Motome (Department of Applied Physics, The University of Tokyo, Japan)
26th July 13, 2018 Dr. Shimpei Ono (Central Research Institute of Electric Power Industry, Japan)
25th May 11, 2018 Dr. Pierre-Antoine Geslin (Mateis lab, INSA Lyon/CNRS / ELyTMaX Lab at Tohoku University / Institute for Materials Research, Tohoku University)
24th Apr. 27, 2018 Prof. Masaru Tsukada (AIMR, Tohoku University)
23rd Dec. 8, 2017 Prof. Jean-Yves Cavaillé (INSA Lyon, France / ELyT MaX Lab at Tohoku University)
22nd July 28, 2017 Prof. Nicolas Mary (INSA Lyon, France / ELyT MaX Lab at Tohoku University)
21st July 21, 2017 Prof. Gael Sebald (INSA Lyon, France / ELyT MaX at Tohoku University)
20th July 7, 2017 Prof. Arun Bansil (Northeastern University)
19th June 30, 2017 Dr. Takeshi Nakanishi (AIST-Tohoku U Mathematics for Advanced Materials Open Innovation Laboratory (MathAM-OIL))
18th June 23, 2017 Prof. Denis Arčon (Jožef Stefan Institute, Slovenia)
17th Apr. 28, 2017 Prof. Ayumi Hirano (AIMR, Tohoku University)
16th Nov. 29, 2016 Dr. David Guy Austing (National Research Council Canada, Canada)
15th Sept. 30, 2016 Prof. C. Suryanarayana (University of Central Florida, U.S.A.)
14th June 17, 2016 Prof. Tomoteru Fukumura (AIMR, Tohoku University)
13th May 13, 2016 Prof. Jean-Yves Cavaillé (ELyT MaX (Joint Lab at Tohoku University), University of Lyon, France)
12th June 26, 2015 Dr. B. Muralidharan (Indian Institute of Technology Bombay, India)
11th June 27, 2014 Prof. Michael B. Santos (The University of Oklahoma, U.S.A.)
10th Nov. 19, 2013 Dr. Pawel Hawrylak (National Research Council Canada, Canada)
9th Oct. 1, 2013 Dr. Yuan T. Lee (Nobel laureate in Chemistry, Academia Sinica of Taiwan)
8th June 28, 2013 Dr. Bjorn Mysen (Geophysical Laboratory, Carnegie Institution for Science, U.S.A.)
7th Apr. 12, 2013 Prof. Yiming Li (National Chiao Tung University, Taiwan)
6th Jan. 18, 2013 Prof. Tomasz Dietl (Polish Academy of Sciences, Poland)
5th Aug. 31, 2012 Prof. John H. Perepezko (University of Wisconsin-Madison, U.S.A.)
4th Aug. 17,2012 Prof. Alain Reza Yavari (Grenoble Institute of Technology, France)
3rd Aug. 10, 2012 Prof. Alan Lindsay Greer (University of Cambridge, U.K.)
2nd July 6, 2012 Prof. Winfried Teizer (Texas A&M University, U.S.A.)
1st May 25, 2012 Prof. Thomas P. Russell (The University of Massachusetts Amherst, U.S.A.)


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