Lab life
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24/09/20
D1 student Takagi participated in 85th Applied Physics
-Takagi: Observation of Electroluminescence from a single CsPbBr3 perovskite nanocrystal.
24/09/03
Vacha, Omagari, Tan, Takagi, Zhang, Matsumoto, Banba, Asano participated in Photochemistry 2024 held in Fukuoka.
-Vacha (oral presentation): In-Situ Monitoring of Ion Migration in Lead Halide Perovskite Heterostructures
-Omagari (poster presentation): Morphology of CsPbCl3:Eu3+ by hot injection method
-Tan (poster presentation): Room temperature photon bunching and collective blinking from CsPbBr3 perovskite quantum dot superlattice
-Takagi (poster presentation): Characterisation of BaZrS3 perovskite nanocrystals by single particle spectroscopy
-Zhang (poster presentation): Spectroscopic investigation on mechanochromic luminescence supramolecular fibres at nanoscale
-Matsumoto (poster presentation): Study on exciton dynamics in supramolecular nanotubes with anthracene rings
-Bamba (poster presentation): Simulation of temperature dependence of Eu/Tb emission intensity ratio in Eu/Tb mixed complexes.
-Asano (poster presentation): Research on photophysical properties of organic-inorganic hybrid perovskite films at the nanoscale.
Tan was awarded the Photochemistry Discussion Group Outstanding Student Presentation Award in the Poster Presentation category.
24/07/03
D3 students Wu and Tan presented their doctor's thesis.
- Tan: Study of the effect of surface plasmon polariton on optical and photophysial properties of nanoscale materials
- Wu: Micrisciouc fluorescence study of ion migration in lead halide perocskite heterostructures
24/04/25
Nithin joined our group as a Ph.D. researcher.
24/04/01
Yoneda and Tahara joined our group as B4 student.
24/02/22
B4 students Asano and Hirao presented their Bachelor's theses.
- Asano: Study on the Nanoscale Photophysical Properties of Organic-Inorganic Hybrid Perovskite Films
- Hirao: Single Crystal Spectroscopy of Upconversion in Submicron Crystals of NaErF4:Tm3+, Yb3+
24/02/13-24/02/14
M2 students Kambe, Kobori, Takagi, and Wang presented their Master's theses.
- Kambe: Enhancement of Photosystem I Functions via Localized Surface Plasmon Effects of Regularly Arranged Gold Nanorods
- Kobori: Study on EL and PL in Polyfluorene Conjugated Polymer Nanoparticles Prepared by Reprecipitation Method
- Takagi: Suppression of Blinking by Ligand Exchange in Single Perovskite Nanocrystals
- Wang: Single-particle Spectroscopy Study of Centrifugation Dependent Product of Lanthanide-doped Perovskite Nanocrystals
Takagi received the Best Presentation Award at the Master's Thesis Presentation.
23/09/05-23/09/07
We participated in Photochemistry 2023 held in Hiroshima.
Tan:(Poster)Surface Plasmon Induced Photoluminescence Enhancement of Cdse/Zns Core-Shell Quantum Dots
Zhang:(Poster)Single-Particle Spectroscopy of Self-assembled Luminescent Nanostructures controlled by Solvent Polarity
Kobori:(Poster)Electroluminescence in Polyfluorene Conjugated Polymer Nanoparticles
Kambe:(Poster)Fabrication of regularly aligned gold nanorod substrates and their localized plasmon effect on the function of photosystem I
Takagi:(Poster) Suppressing Blinking in CsPbBr3 Perovskite Nanocrystals through Ligand Exchange
Matsumoto:(Poster) Exciton Diffusion in Single Supramolecular Nanorings
23/07/23-23/07/28
We attended The 31st International Conference on Photochemistry held in Sapporo, Japan.
Vacha: (Invited) Nanoscale photophysical properties and real-time in situ dynamics of halide perovskite films and nanocrystals
Omagari: (Poster) The Effect of Synthetic and Post-synthetic Conditions on the Luminescent Properties of CsPbBr3 Nanocrystals
Tan: (Poster) Enhanced Photoluminescence of CdSe/ZnS Core-shell Quantum Dots Induced by Surface Plasmon Nanohole Arrays
Wu: (Poster) Real-Time In-Situ Monitoring of Nanocrystal Formation and Ion Migration in Perovskite-Metal Organic Framework Composites
Takagi: (Poster) Suppressing Blinking in CsPbBr3 Perovskite Nanocrystals through Ligand Exchange
Matsumoto: (Poster) Exciton Diffusion in Single Supramolecular Nanorings
Ms. Wu won the Poster Award(Springer-Nature PPS Award)! Congratulations!
23/04/27
We had a welcome party for Prof.Kim and new members!
22/09/13-22/09/15
We participated in Photochemistry 2022 held at Kyoto University..
20/02/14
Mr. Goto awarded master thesis.
20/01/12~13
We went sking with Hayakawa Lab
19/10/28
We held a wellcome and farewell party for Mr.Sam, Mr.chen,Ms.Anubha,Ms.Koishihara
19/09/10-09/12
We participated in the photochemical debate.
19/04/25
We held a welcome party for Mr.Sam, Mr.Nakamura, Mr.Shima!
19/02/25
We went sking at Nozawa Onsen Ski Resort, Nagano for 2 days.
18/10/3
We had a farewell party for researcher Mr. Sharma.
18/9/5~7
Researchers Dr. Sharma, Mr. Omagari, and Mr. Narishima of D3 participated in the photochemical debate.
18/8/3
Mr. Suzuki of M3 (Tokyo Institute of Technology · Tsinghua University Joint Program) gave a presentation on his study.
18/6/20
We had a research presentation with Prof. Hirata of the University of Electro-Communications.
18/5/18
We held a welcome party for Dr. Omagari, Mr. Sou, Mr. Totsuka, Mr. Furuya and Ms. Quynh!
18/2/18
Undergraduate thesis presentations took place. Goto won the Thesis Award. Congratulations!!
Title: Characterization of red emitting molecules with eight-membered rings by single molecule spectroscopy.
15/2/18
Farewell party held for Dina Petrova.
13-14/2/18
Master Thesis presentations took place.
Ueda: Evaluation of orientation process of photoalignable soft material
Nakamura: Fluorescence properties and conformation of polyfluorenes
Hatazaki: Single particle spectroscopy of photosystem 1 - the attribution of function to the structure
Mr. Hatazaki won the Master Thesis Award!! Congratulations!!
19-20/1/18
We went skiing at Nozawa Onsen Ski Resort, Nagano for 2 days.
13/12/17
Farewell party held for assistant professor Hirata. Dr. Hirata has moved to the University of Electro-Communications to build a new lab. Wish you all the best in the new position.
25-27/10/17
Mr. Suzuki took part in 11th Tsinghua Univ. - Tokyo Tech. Joint Workshop on Advanced Materials at Yixing in Jiangsu Province, China.
Title: Photoluminescent Nematic Liquid Crystalline Elastomer towards the Evaluation of its Thermomechanical Diformation Process with Single-molecule Spectroscopy
24/10/17
Professor Ryszard Jankowiak visited our lab from Kansas State University.
19/10/17
Professor Albert M. Brouwer visited our lab from University of Amsterdam.
04/10/17
Interim Presentation of Master Thesis took place.
Nakamura: Fluorescence property and conformation of polyfluorene single chain in different media
Hatazaki: Single particle spectroscopy of photosystem 1 towards the attribution of function to the structure
Ueda: Evaluation of orientation process of photoalignable soft material
21/09/17
Mr. Suzuki (Master 2nd) has returned to Japan!
13~15/09/17
Mr. Sharma(researcher) took part in 23rd International Workshop on Single Molecule Spectroscopy and Super-resolution Microscopy in the Life Science.
Sharma:(Poster session) Ensemble and Single Particle Photophysical Characterization of (AgIn)x Zn2(1-x)S2 Nanocrystals
11~15/09/17
Mr. Narushima(Ph.D 2nd), and Mr. Nakamura(Master 2nd) took part in 81st Prague Meeting on Macromolecule.
Narushima:(Poster session) Visualization of triplet exciton diffusion in crystalline upconversion materials
Nakamura:(Poster session) Fluorescence properties and conformation of polyfluorene single chains in different environments
Mr. Narushima received the poster award.
Congratulations!!
10~13/09/17
Mr. Sharma(researcher) took part in 15th Conference on Methods and Applications in Fluorescence.
Sharma:(Oral session) Photoluminescence of (AgIn)x Zn2(1-x)S2 solid solutions: Impact of Zn alloying and origin of spectral broadening
5~8/09/17
Mr. Narushima (Ph.D 2nd) took part in the 78th JSAP Autumn Meeting, 2017.
Narushima:(JSAP Young Scientist Award Speech) Direct visualization of triplet exciton diffusion in molecular crystals
4~6/09/17
Vacha Lab took part in Annualu Meeting on Photochemistry 2017.
Sharma:(Poster session) Single Particle Luminescence Spectroscopy of Perovskite-Halide Nanocrystals
Ueda:(Poster session) Toward the evaluation of orientation process of photoalignmet soft material using single particle tracking
Hatazaki:(Poster session) Single particle spectroscopy of photosystem ? towards the attribution of function to the structure
Nakamura:(Oral session) Fluorescence property and conformation of polyfluorene single chain in different media
Assistant professor Hirata received the award of the 17th Photochemical Society Encouragement Award.
Congratulations!!
01/08/2017
We held a meeting on Okayama University's with Mr. Orita for group research.
23/05/2017
The paper by Narushima (Ph.D 2nd) is accepted by Nanoscale
15/05/2017
01/04/2017
Mr.Goto(B4) has joined the Vacha Lab!!
01/04/2017
Homepage is renewed.
19/04/2016
Prof. Vacha was appointed a Visiting Professor at Charles University in Prague, and this year will be spending part of his time abroad.
22/09/2014
Our research was introduced in news & views of Nature Materials.
http://www.nature.com/nmat/journal/v13/n10/full/nmat4096.html
07/09/2014
A new article was published.
S. Hirata, K. Totani, T. Yamashita, C. Adachi, M. Vacha: Large reverse saturable absorption under weak continuous incoherent light. Nature Mater. (2014) DOI: 10.1038/nmat4081.
24/07/2014
New reports were published.
Y. Honmou, S. Hirata, H. Komiyama, J. Hiyoshi, S. Kawauchi, T. Iyoda, M. Vacha: Single molecule electroluminescence and photoluminescence of polyfluorene unveils the photophysics behind the green emission band. Nature Commun. (2014) DOI: 10.1038/ncomms5666
K. Katayama, S. Hirata, M. Vacha: Circularly polarized luminescence from individual microstructures of conjugated polymer aggregates with solvent-induced chirality. Phys. Chem. Chem. Phys. (2014) DOI: 10.1039/C4CP02643H
09/05/2014
We held a welcome party for Mr. Narushima and Mr. Ueda！Mr.Imagawa and Mr.Tsubomoto from Tokyo University of Agriculture and Technology also joined this party.
08/04/2014
The school year 2014 in the lab started! As new members, Mr. Narushima (M1) and Mr. Ueda (B4) joined the laboratory.
01/04/2014
Prof. Vacha is promoted to a full professor.
26/03/2014
We took a picture together on the day of the graduation ceremony.
We wish the fresh graduates, Mr. Katayama and Mr. Lee, success in their work!
20/03/2014
We held a farewell party for the graduating M2 Mr. Lee in Korean BBQ house.
28/02/2014
Graduation thesis presentation was held.
Mr. Matsuda from our lab received the Thesis Award!
Congratulations！
18/02/2014
Master thesis presentation was held.
Thema:
Mr. Katayama：Microscopic evaluation of circulary polarized luminescense by a confocal microscope
Mr. Lee：Investigation of three dimensional molecular diffusion in liquid crystals
using single-molecule spectroscopy
13-14/02/2014
We went skiing as usual, this year we returned to the Naeba ski resort. Mr. Suzuki and Mr. Ueda who will join the laboratory from April also went with us.
12-14/09/2013
We attended Annual Meeting on Photochemistry 2013 held in Matsuyama, Japan.
（Poster presentations）
Mr. Katayama：Microscopic evaluation of circulary polarized luminescense by a confocal microscope
Mr. Lee：Investigation of three dimensional molecular diffusion in liquid crystals
using single-molecule spectroscopy
Mr. Noda：Single-molecule analysis of chain dynamics across the thickness direction in polymer thin films
(Oral presentations）
Professor Vacha
：Novel single-molecule techniques for the study of structure and function of light-harvesting complexes of green photosynthetic bacteria
Dr. Hirata：Metal-free Nonlinear Absorbers with an Ultralow Power Threshold
02-04/08/2013
WeI took part in a summer camp of the Kanto polymer young Society, and had a meaningful time with students and teachers of other university.
01/03/2013
Undergraduate thesis presentations took place. K. Noda from our lab received the Thesis Award!
24/02/2013-25/02/2013
We went skiing at Nagano.
18/02/2013-19/02/2013
Master thesis presentations took place.
01/10/2012
Homepage renewal finnished!
28/09/2012
A welcom party held for the new assistant professor in our lab.
14/09/2012
After the Meeting of the Japanese Photochemistry Association,we held a party with former graduates and former assistant professors.
12/09/2012-14/09/2012
We took part in the 2012 Meeting of the Japanese Photochemistry Association
held in Tokyo.
Students in our lab took part in the poster session with the following themes.
| （Oral Session only） | Study of antenna complex of green sulfur bacteria and of artificial antenna complex of chlorophylls and dye molecules by single molecule spectroscopy D3 Shu Furumaki |
 |
Electroluminescence of conjugated polymers confined in vertical nanocylinders of a block-copolymer film. M2 Yoshihiro Honmo |
 |
A single-molecule study on spectral jump behavior of oligo(phenylene vinylene) derivates M2 Hiroyuki Kobayashi |
 |
Development of apparatus for the measurement of circularly polarized luminescence based on confocal microscope M1 Kenta Katayama |
20/06/2012
Prof. A. M. Brouwer(van 't Hoff Institute for Molecular Sciences, University of Amsterdam) gave a lecture about "Molecular motion observed or induced with light" on our campus.We had dinner together.
27/04/2012
A welcom party held for the new members in our lab.
Afew former graduates also appeared at the welcome party.。Thank you very much.
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