Publications by authors named "Heishun Zen"

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Infrared FEL-Induced Alteration of Zeta Potential in Electrochemically Grown Quantum Dots: Insights into Ion Modification.
Sukrit Sucharitakul, Siripatsorn Thanasanvorakun, Vasan Yarangsi, Suparoek Yarin, Kritsada Hongsith, Heishun Zen

Nanomaterials (Basel)· October 2025

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Direct Analysis of Solid-Phase Carbohydrate Polymers by Infrared Multiphoton Dissociation Reaction Combined with Synchrotron Radiation Infrared Microscopy and Electrospray Ionization Mass Spectrometry.
Takayasu Kawasaki, Heishun Zen, Kyoko Nogami, Ken Hayakawa, Takeshi Sakai

Polymers (Basel)· August 2025

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Infrared Free-Electron Laser: A Versatile Molecular Cutter for Analyzing Solid-State Biomacromolecules.
Takayasu Kawasaki, Atsushi Nagase, Ken Hayakawa, Fumitsuna Teshima, Kiyohisa Tanaka, Heishun Zen

ACS Omega· April 2025

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Temporal evolution of electron-bunch length in macropulse of resonator-type free-electron lasers.
Norihiro Sei, Heishun Zen, Hideaki Ohgaki, Ryoichi Hajima

iScience· December 2024

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A van der Waals porous crystal featuring conformational flexibility and permanent porosity for ultrafast water release.
Kentaro Maejima, Heishun Zen, Hiroyasu Sato, Eiji Nishibori, Tomoya Enjou

Commun Chem· November 2024

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Breakdown of argon by a train of high-repetition long-wave-infrared pulses from a free-electron laser oscillator.
Ryoichi Hajima, Keigo Kawase, James K Koga, Heishun Zen, Hideaki Ohgaki

Opt Express· June 2024

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Nonlinear compression of naturally down-chirped superradiance pulses from a free-electron laser oscillator by thick germanium plates.
Heishun Zen, Ryoichi Hajima, Hideaki Ohgaki

Opt Express· November 2023

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Dissociation process of polyalanine aggregates by free electron laser irradiation.
Hisashi Okumura, Satoru G Itoh, Heishun Zen, Kazuhiro Nakamura

PLoS One· September 2023

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Author Correction: Full characterization of superradiant pulses generated from a free-electron laser oscillator.
Heishun Zen, Ryoichi Hajima, Hideaki Ohgaki

Sci Rep· June 2023

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Full characterization of superradiant pulses generated from a free-electron laser oscillator.
Heishun Zen, Ryoichi Hajima, Hideaki Ohgaki

Sci Rep· April 2023

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Crystallinity in periodic nanostructure surface on Si substrates induced by near- and mid-infrared femtosecond laser irradiation.
Reina Miyagawa, Daisuke Kamibayashi, Hirotaka Nakamura, Masaki Hashida, Heishun Zen

Sci Rep· December 2022

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Degradation of Lignin by Infrared Free Electron Laser.
Takayasu Kawasaki, Heishun Zen, Takeshi Sakai, Yoske Sumitomo, Kyoko Nogami

Polymers (Basel)· June 2022

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Enhancement of Oxidation of Silicon Carbide Originating from Stacking Faults Formed by Mode-Selective Phonon Excitation Using a Mid-Infrared Free Electron Laser.
Yuki Maeda, Heishun Zen, Atsushi Kitada, Kuniaki Murase, Kazuhiro Fukami

J Phys Chem Lett· April 2022

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Study of the origin of the complex beam profile of a hole-coupled free electron laser oscillator.
Heishun Zen, Hideaki Ohgaki

J Opt Soc Am A Opt Image Sci Vis· November 2021

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Application of mid-infrared free-electron laser for structural analysis of biological materials.
Takayasu Kawasaki, Heishun Zen, Kento Ozaki, Hironari Yamada, Kazumasa Wakamatsu

J Synchrotron Radiat· January 2021

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Photo-Modification of Melanin by a Mid-infrared Free-electron Laser.
Takayasu Kawasaki, Aomi Sato, Yuki Tominaga, You Suzuki, Takahiro Oyama, Heishun Zen

Photochem Photobiol· July 2019

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Real-time observation of structural change in semi-crystalline polymer films through mid-IR transmission spectroscopy: determination of instantaneous film temperature during recrystallization.
Sandeep Kumar Maurya, Takashi Nakajima, Keisuke Mizobata, Heishun Zen, Toshiteru Kii

Opt Express· August 2018

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Pulse duration and wavelength stability measurements of a midinfrared free-electron laser.
Yu Qin, Heishun Zen, Xiaolong Wang, Toshiteru Kii, Takashi Nakajima

Opt Lett· April 2013

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Single-shot spectra of temporally selected micropulses from a mid-infrared free-electron laser by upconversion.
Xiaolong Wang, Takashi Nakajima, Heishun Zen, Toshiteru Kii, Hideaki Ohgaki

Opt Lett· December 2012

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