Welcome to Structural Chemistry Laboratory!

This is a website of Structural Chemistry Laboratory in Waseda University.
(Principal Investigator: Takashi HIROI)

Japanese website

About PI

Hiroi_2022
Name Takashi HIROI
Date of Birth December 13, 1989
Gender Male
Birthplace Tokyo
e-mail thiroi ＠ waseda.jp
Phone +81-3-5286-2748 (ext. 3199)
Place 62-B2-06, Nishi-Waseda Campus
Waseda University
For researchers ORCiD researchmap

CV

2025.4 － Associate Professor, Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University
2023.4 － 2025.3 Associate Professor, College of Engineering, Shibaura Institute of Technology
2020.4 － 2023.3 ICYS Researcher, International Center for Young Scientists, National Institute for Materials Science
2019.11 － 2020.3 Project Assistant Professor, Department of Chemistry, School of Science, The University of Tokyo (PI: Prof. Kaoru YAMANOUCHI)
2014.11 － 2019.10 Assistant Professor, Department of Chemistry, School of Science, The University of Tokyo (PI: Prof. Kaoru YAMANOUCHI)
2017.7.24 PhD in Science (School of Science, University of Tokyo)
2014.4 － 2014.10 Doctor course, Department Chemistry, Graduate School of Science, The University of Tokyo (PI: Mitsuhiro SHIBAYAMA)
2012.4 － 2014.3 Master course, Department Chemistry, Graduate School of Science, The University of Tokyo (PI: Mitsuhiro SHIBAYAMA)
2010.4 － 2012.3 Bachelor course, Department Chemistry, Faculty of Science, The University of Tokyo (PI: Hiro-o HAMAGUCHI)
2008.4 － 2010.3 Bachelor course, College of Arts and Sciences, The University of Tokyo (PI: Hiro-o HAMAGUCHI)
2005.4 － 2008.3 Senior High School at Komaba, University of Tsukuba

Publication

25.
Itsuki Yoda, Takashi Hiroi, Yuki Akagi
Effects of fabrication conditions on the bulk and surface network structures of polyacrylamide gels
Colloids Surf. A 741, 140269 (2026)
DOI:10.1016/j.colsurfa.2026.140269
24.
Moeka Noto, Kazunori K. Fujii, Yuetsu Shu, Takashi Hiroi, Takaki Koide
Hydrogels Formed by the Self-Assembly of Collagen-Mimetic Peptides With a Constrained Backbone Structure
Chem. Eur. J. e03278 (2026)
DOI:10.1002/chem.202503278
23.
Ryo Sakai, Takashi Hiroi, Ryota Tamate, Timothée Mouterde, Mizuki Tenjimbayashi
Thicker lubricant layer enhances the droplet mobility on lubricant-infused smooth surfaces
Appl. Phys. Lett. 126 (23), 231602 (2025)
DOI:10.1063/5.0274510
22.
Akiko Hori, Yuta Takeuchi, Tadashi Kawasaki, Naoki Toyama, Hidetaka Yuge, Takashi Hiroi
Synthesis and π-Hole vs. π Effects of Pt(II) Complexes with Pentafluorophenyl and Phenyl-Substituted Bipyridines
Crystals 14 (5), 430 (2024)
DOI:10.3390/cryst14050430
21.
Takashi Hiroi*, Sadaki Samitsu, Kunie Ishioka, Hideaki Kano
Dynamic Raman Scattering: Molecular-selective Correlation Spectroscopy for Diffusion Dynamics in Complex Systems
J. Phys. Chem. C 127 (21), 10245–10252 (2023)
DOI:10.1021/acs.jpcc.3c01824
A part of Hiro-o Hamaguchi Festschrift Virtual Special Issue
Selected as Supplementary cover
20.
Jonathon Tanks, Takashi Hiroi, Kenji Tamura, Kimiyoshi Naito
Tethering Organic Disulfides to Layered Silicates: A Versatile Strategy for Photo-Controllable Dynamic Chemistry and Functionalization
Bull. Chem. Soc. Jpn. 96 (1), 65–71 (2023)
DOI:10.1246/bcsj.20220309
19.
Yuji Kamiyama, Ryota Tamate, Takashi Hiroi, Sadaki Samitsu, Kenta Fujii, Takeshi Ueki
Highly stretchable and self-healable polymer gels from physical entanglements of ultrahigh–molecular weight polymers
Sci. Adv. 8 (42), eadd0226 (2022)
DOI:10.1126/sciadv.add0226
18.
Moataz Mekawy, Takashi Hiroi, Mizuki Tenjimbayashi, Jin Kawakita
Wetting behavior of a water droplet on a mutual periodic micro-patterned ternary texture structure
Colloids Surf. A Physicochem. Eng. Asp. 653 130009 (2022)
DOI:10.1016/j.colsurfa.2022.130009
17.
Mizuki Tenjimbayashi, Gen Hayase, Takashi Hiroi, Takeshi Ueki
Single-Step Wet-Process Formation of Dual-Layer Superslippery Coating with Transparency and Robust Omniphobicity
Adv. Mater. Interfaces 9 (22), 2200497 (2022)
DOI:10.1002/admi.202200497
16.
Takashi Hiroi*, Sadaki Samitsu, Hideaki Kano, Kunie Ishioka
Calibration for a count rate-dependent time correlation function and a random noise reduction in pulsed dynamic light scattering
Anal. Sci. 38 (3), 607–611 (2022)
DOI:10.1007/s44211-022-00071-0
15.
Takashi Hiroi, Yuya Morimoto, Reika Kanya, Kaoru Yamanouchi
Observation of laser-assisted electron-impact ionization in ultrashort intense laser fields
Phys. Rev. A 104 (6), 062812 (2021)
DOI:10.1103/PhysRevA.104.062812
14.
Takashi Hiroi*, Sadaki Samitsu, Kunie Ishioka
Post-processing noise reduction via all-photon recording in dynamic light scattering
Sci. Technol. Adv. Mater. Methods 1 (1), 134–142 (2021)
DOI:10.1080/27660400.2021.1957403
13.
Takashi Hiroi*, Kazu Hirosawa, Yuya Okazumi, Sai Venkatesh Pingali, Mitsuhiro Shibayama
Mechanism of heat-induced gelation for ovalbumin under acidic conditions and the effect of peptides
Polym. J 52 (11), 1263–1272 (2020)
DOI:10.1038/s41428-020-0382-1
12.
Takashi Hiroi*, Mitsuhiro Shibayama
Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
J. Vis. Exp. (119), e54885 (2017)
DOI:10.3791/54885
11.
Takashi Hiroi*, Shinji Kondo, Takamasa Sakai, Elliot Paul Gilbert, Young-Soo Han, Tae-Hwan Kim, Mitsuhiro Shibayama
Fabrication and Structural Characterization of Module-Assembled Amphiphilic Conetwork Gels
Macromolecules 49 (13), 4940–4947 (2016)
DOI:10.1021/acs.macromol.6b00842
10.
Takashi Hiroi*, Yuya Okazumi, Ken C. Littrell, Yuri Narita, Naoki Tanaka, Mitsuhiro Shibayama
Mechanism of heat-induced gelation for ovalbumin and its N-terminus cleaved form
Polymer 93 152–158 (2016)
DOI:10.1016/j.polymer.2016.04.036
9.
Takashi Hiroi*, Seisuke Ata, Mitsuhiro Shibayama
Transitions of Aggregation States for Concentrated Carbon Nanotube Dispersion
J. Phys. Chem. C 120 (10), 5776–5782 (2016)
DOI:10.1021/acs.jpcc.5b12464
8.
Shinji Kondo, Takashi Hiroi, Young-Soo Han, Tae-Hwan Kim, Mitsuhiro Shibayama, Ung-il Chung, Takamasa Sakai
Reliable Hydrogel with Mechanical “Fuse Link” in an Aqueous Environment
Adv. Mater. 27 (45), 7407–7411 (2015)
DOI:10.1002/adma.201503130
7.
Takumi Kusano, Takashi Hiroi, Kazuki Amemiya, Masaki Ando, Tsuyoshi Takahashi, Mitsuhiro Shibayama
Structural evolution of a catalyst ink for fuel cells during the drying process investigated by CV-SANS
Polym. J 47 546–555 (2015)
DOI:10.1038/pj.2015.36
6.
Kengo Nishi, Saki Tochioka, Takashi Hiroi, Taihei Yamada, Kenta Kokado, Tae-Hwan Kim, Elliot Paul Gilbert, Kazuki Sada, Mitsuhiro Shibayama
Structural Analysis of Lipophilic Polyelectrolyte Solutions and Gels in Low-Polar Solvents
Macromolecules 48 (11), 3613–3621 (2015)
DOI:10.1021/acs.macromol.5b00753
5.
Mitsuhiro Shibayama, Kengo Nishi, Takashi Hiroi
Gelation Kinetics and Polymer Network Dynamics of Homogeneous Tetra-PEG Gels
Macromolecular Symposia 348 (1), 9–13 (2015)
DOI:10.1002/masy.201400164
4.
Takashi Hiroi, Michael Ohl, Takamasa Sakai, Mitsuhiro Shibayama
Multiscale Dynamics of Inhomogeneity-Free Polymer Gels
Macromolecules 47 (2), 763–770 (2014)
DOI:10.1021/ma402439v
3.
Takashi Hiroi, Mitsuhiro Shibayama
Dynamic light scattering microscope: Accessing opaque samples with high spatial resolution
Opt. Express 21 (17), 20260–20267 (2013)
DOI:10.1364/OE.21.020260
Highlighted in Advances in Engineering (2014/2/17)
2.
Kengo Nishi, Takashi Hiroi, Kei Hashimoto, Kenta Fujii, Young-Soo Han, Tae-Hwan Kim, Yukiteru Katsumoto, Mitsuhiro Shibayama
SANS and DLS Study of Tacticity Effects on Hydrophobicity and Phase Separation of Poly(N-isopropylacrylamide)
Macromolecules 46 (15), 6225–6232 (2013)
DOI:10.1021/ma401349v
1.
Hanako Asai, Kengo Nishi, Takashi Hiroi, Kenta Fujii, Takamasa Sakai, Mitsuhiro Shibayama
Gelation process of Tetra-PEG ion-gel investigated by time-resolved dynamic light scattering
Polymer 54 (3), 1160–1166 (2013)
DOI:10.1016/j.polymer.2012.12.053