External
Prof. Shuichi Ogawa (Nihon University, Japan)
Dr. Akitaka Yoshigoe (Japan Atomic Energy Agency (JAEA), Japan)
Dr. Yasutaka Tsuda (JAEA, Japan)
Prof. Jodie Lutkenhaus (Texas A&M University)

Internal
Dr. Michael Pettes (MPA-CINT)
Dr. Yongqiang Wang (MST-8)

May

• An articles on our paper (work function lowering of LaB6 by monolayer hexagonal boron nitride coating for improved photo- and thermionic-cathodes) was published in LANL STE Highlights https://www.lanl.gov/science-innovation/science-highlights/2023/2023-04.php#MaterialsScienceandTechnology-3
• We were invited to present our work under the DOE U.S.-Japan Science and Technology Cooperation Program in High Energy Physics at The 45th meeting of the US-Japan Science and Technology Cooperation Program in High Energy Physics in Hawaii (in-person). The topic was on the use of 2D materials as unique protection layer for bialkali photocathodes. https://indico.physics.lbl.gov/event/2259/

April

• Our joint proposal with Prof. Jodie Lutkenhaus for 2023 TAMU-LANL Collaborative Program on Two-dimensional MXene Coatings for Protection of Actinides has been awarded as Research Project. A PhD student at Texas A&M Univeristy (TAMU) will be funded for four years by LANL. Congratulations, Hisato! https://nationallabsoffice.tamus.edu/2023-lanl-collaborative-research-program-announcement/

March

• An articles on our paper (Near-Threshold Photoemission from Graphene-Coated (110)) was published in LANL STE Highlights https://www.lanl.gov/science-innovation/science-highlights/2023/2023-02.php#MaterialsPhysicsandApplications-2
• An article on our paper (rugged bialkali photocathodes encapsulated with graphene and thin metal film) was published in LANL STE Highlights https://www.lanl.gov/science-innovation/science-highlights/2023/2023-02.php#MaterialsPhysicsandApplications-4

• Hisato Yamaguchi*, Ryunosuke Yusa, Gaoxue Wang, Michael T Pettes, Fangze Liu, Yasutaka Tsuda, Akitaka Yoshigoe, Tadashi Abukawa, Nathan A Moody, Shuichi Ogawa* "Work function lowering of LaB6 by monolayer hexagonal boron nitride coating for improved photo- and thermionic-cathodes" Applied Physics Letters 122, 141901 (2023). https://aip.scitation.org/doi/full/10.1063/5.0142591
  • Selected as an Editor's Pick
• Lei Guo*, Fangze Liu, Kazuki Koyama, Nolan Regis, Anna M Alexander, Gaoxue Wang, Jeffrey DeFazio, James A Valdez, Anju Poudel, Masahiro Yamamoto, Nathan A Moody, Yoshifumi Takashima, Hisato Yamaguchi* "Rugged bialkali photocathodes encapsulated with graphene and thin metal film" Scientific Reports 13, 2412 (2023). https://www.nature.com/articles/s41598-023-29374-6
• Christopher J Knill, Hisato Yamaguchi, Kenji Kawahara, Gaoxue Wang, Enrique Batista, Ping Yang, Hiroki Ago, Nathan Moody, Siddharth Karkare "Near-Threshold Photoemission from Graphene-Coated (110)" Physical Review Applied 19, 014015 (2023). https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.19.014015

October

• Hisato Yamaguchi gave an invited talk on the use of 2D materials as unique protection layer for bialkali photocathodes at International Workshop on Energy Recovery Linacs (ERL 22) held at Cornell University (in person). https://www.classe.cornell.edu/NewsAndEvents/ERL2022/WebHome.html

May

• Hisato Yamaguchi gave an invited talk on the use of 2D materials as unique protection layer for bialkali photocathodes at the 241st Electrochemical Society (ECS) meeting (presentation via online).
• Hisato Yamaguchi presented a poster on the use of 2D materials as unique protection layer for bialkali photocathodes at Materials Research Society (MRS) Spring meeting in Hawaii (in person).

October

• Hisato Yamaguchi gave an invited talk on the use of 2D materials as unique protection layer for bialkali photocathodes at Photocathode Physics for Photoinjectors conference (virtual).

September

• Hisato Yamaguchi gave an invited talk on the use of 2D materials as unique protection layer for bialkali photocathodes at the Japanese Society of Applied Physics (JSAP)-Optica (OSA) joint symposia (virtual).

December

• Hisato Yamaguchi gave an invited talk on the use of 2D materials as unique protection layer for bialkali photocathodes at the Japanese Beam Physics Society Workshop (virtual).

October

• Our paper on Gas Barrier Properties of Chemical Vapor-Deposited Graphene to Oxygen Imparted with Sub-electronvolt Kinetic Energy was published in J. Phys. Chem. Lett. https://pubs.acs.org/doi/full/10.1021/acs.jpclett.0c02112. It was selected as an inside cover and news released from LANL https://discover.lanl.gov/news/1029-graphene/. Congratulations, Hisato!

June

• Our paper on Graphene as reusable substrate for bialkali photocathodes was published in Applied Physics Letters https://aip.scitation.org/doi/full/10.1063/5.0010816. An article on our publication was news released from LANL https://discover.lanl.gov/news/0630-graphene-electron-sources/. Congratulations, Hisato!

November

• Our R&D 100 Award on Atomic Armor was featured by our industorial collaborator, Photonis. Click here.
• Our R&D 100 Award on Atomic Armor was featured in LANL News Release. https://www.lanl.gov/discover/news-release-archive/2019/November/1106-rd-100-awards.php

October

• Our R&D 100 Award on Atomic Armor was featured in DOE website.https://www.energy.gov/articles/rd-world-magazine-announces-2019-rd-100-winners
• Our atomically thin protection coating technology, Atomic Armor won prestigious R&D 100 Award!! (Category: IT/Electrical) The technology was also selected as gold medalist in R&D Special Recognition: Market Disruptor - Products. Congratulations, Nathan, Hisato and the team! https://www.rdworldonline.com/2019-rd-100-award-winners-unveiled/

June

• Our atomically thin protection coating technology was featured in a local newspaper, Albuquerque Journal. Nice, Hisato! https://www.lanl.gov/newsroom/science-columns/top-columns-and-blogs/2019/abq-journal-stronger-than-steel.php

April

• Our atomically thin protection coating technology, Atomic Armor was featured in LANL Science Video. Great job, Nathan and Hisato! https://www.youtube.com/watch?v=S4krKYGUopg&feature=youtu.be

March

• Science animation on our efforts of protecting photocathodes for accelerator technology has been published on YouTube. Nice job, Hisato and Nathan! https://www.youtube.com/watch?v=rkusTI_45o0

September

• Our work on free-standing bialkali photocathodes using atomically thin substrates published in Advanced Materials Interfaces was featured in September 2018 issue of Los Alamos National Laboratory Science Highlights. Click here.
• Our work on free-standing bialkali photocathodes using atomically thin substrates published in Advanced Materials Interfaces was press released by our contributor's institution, Argonne National Laboratory. Click here.

August

• Our paper on free-standing bialkali photocathodes using atomically thin substrates was published in Advanced Materials Interfaces https://doi.org/10.1002/admi.201800249 and selected as the back cover https://doi.org/10.1002/admi.201870065 as well as being featured in LANL Mesoscale Connections Spring 2018 Issue. Congratulations, Hisato and Fangze!

• Shuichi Ogawa*, Hisato Yamaguchi*, Edward F Holby, Takatoshi Yamada*, Akitaka Yoshigoe, Yuji Takakuwa "Gas Barrier Properties of Chemical Vapor-Deposited Graphene to Oxygen Imparted with Sub-electronvolt Kinetic Energy" The Journal of Physical Chemistry Letters 11, 9159–9164 (2020). https://pubs.acs.org/doi/full/10.1021/acs.jpclett.0c02112
  • Selected as an inside cover

• Hisato Yamaguchi and Nathan A. Moody "Atomic Armor: R&D 100 Award Winner" LANL Science Video (2019). https://www.youtube.com/watch?v=S4krKYGUopg
• Hisato Yamaguchi and Nathan A. Moody "Atomic Armor for accelerator technology: 2D Shield for photocathodes" Science Animation (2019). https://www.youtube.com/watch?v=rkusTI_45o0

H.Yamaguchi*, Jimmy Granstrom, Wanyi Nie, Hossein Sojoudi, Takeshi Fujita, Damien Voiry, Mingwei Chen, Gautam Gupta, Aditya D. Mohite, Samuel Graham, and Manish Chhowalla* "Reduced Graphene Oxide Thin Films as Ultrabarriers for Organic Electronics" Adv. Energy Mater. 4, 1300986 (2014). *corresponding authors DOI: 10.1002/aenm.201300986

(Invited) "Overcoming quantum efficiency-lifetime limit of photocathodes for accelerator beam source by integration of atomically thin protecting layers" The 45th meeting of the US-Japan Science and Technology Cooperation Program in High Energy Physics (HEP) (in-person), Hawaii, U.S.A. (May 2023)

• (Invited) "2D materials as protective coatings for photocathodes" International Workshop on Energy Recovery Linacs (ERL 22) (in-person) Cornell University, U.S.A. (October 2022)
• (Poster) "Gas Barrier Properties of Chemical Vapor-Deposited Graphene to Oxygen Imparted with Sub-eV Kinetic Energy" Materials Research Society (MRS) Spring meeting (in-person), Hawaii, U.S.A. (May 2022)
• (Poster) "Photoemission from Bialkali Photocathodes Through an Atomically Thin Protection Layer" Materials Research Society (MRS) Spring meeting (in-person), Hawaii, U.S.A. (May 2022)
• (Invited) "Towards the use of 2D materials as unique protection layer for accelerator beam source" Electrochemical Society (ECS) annual meeting (presented online) Vancouver, Canada (May 2022)

• (Invited) "Towards the use of 2D materials as unique protection layer for bialkali photocathodes" Photophysics for Photoinjectors (P3)-virtual (October 2021)
• (Invited) "Towards the use of 2D materials as unique protection layer for accelerator beam source" JSAP-OSA Joint Symposia-virtual (September 2021)
• (Invited) "Overcoming quantum efficiency-lifetime limit of photocathodes for accelerator beam source by integration of atomically thin protecting layers" DOE Office of Science High Energy Physics (HEP) visit to LANL-virtual (July 2021)

• (Invited) "Armed cathode development" Japanese Beam Physics Workshop-virtual (December 2020)
• (Invited) "Atomic Armor" Science on Tap Bradbury Science Museum, U.S.A. (January 2020)

• Hisato Yamaguchi, Fangze Liu, Nathan A. Moody
  "Photocathodes with an enhancement layer and method of making the same"
  US 11,062,890 (2021).

• Nathan Moody, Jeffrey Pietryga, Gautam Gupta, Aditya Mohite, Vitaly Pavlenko, John Lewellen, Hisato Yamaguchi
  "Photocathodes with protective in-situ graphene gas barrier films and method of making the same"
  US 10,535,486 (2020).