Los Alamos National Laboratory

Los Alamos National Laboratory

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The Light to Energy (L2E) team expertise comprises photophysics of organic and nano-sized materials.

 

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2017

March

2016

October

  • Gautam Gupta accepted an associate professor position in the Department of Chemical Engineering at the University of Louisville, KY. Congratulations and best of luck!

September

  • Hisato Yamaguchi, Fangze Liu, Gautam Gupta, and Aditya D. Mohite was awarded Los Alamos National Laboratory 2015 Distinguished Performance Award for Large Teams. Their contributions in Applied Cathode Enhancement and Robustness Technology (ACERT) effort was evaluated highly for its dedication, effort, and outstanding, sustained performance that helped support Los Alamos Naiontal Laboratory's transformational science in a safe, secure workplace.

July

  • Hsinhan (Dave) Tsai's, Wanyi Nie's and Jean-Christophe Blancon's (internal collaborator) paper on high efficient and stable solar cells based on two-dimensional perovskite published in Nature (doi:10.1038/nature18306) was featured in a Los Alamos National Laboratory News Release titled, "Flipping crystals improves solar-cell performance". Congratulations, Hsinhan (Dave) Tsai, Wanyi Nie and Jean-Christophe Blancon!
  • Ulises Martinez has been made a staff scientist at Los Alamos. This is due to his important contributions in the effort of developing non-precious metal catalysts for fuel cells. Congratulations!

June

  • Dustin Cummins's, Ulises Martinez's, and Rajesh Kappera's paper on enhanced catalytic activity of hydrazine-treated MoS2 was published in Nat. Comm. doi:10.1038/ncomms11857. Congratulations, Dustin Cummins, Ulises Martinez, and Rajesh Kappera!
  • Raymond Fullon's and Rajesh Kappera's co-authored paper on individual sheet level study of catalytic activity in MoS2 was published in Nat. Mater. doi:10.1038/nmat4660. Congratulations, Raymond Fullon and Rajesh Kappera!

May

  • Wanyi Nie's, Jean-Christophe Blancon's (internal collaborator) and Hsinhan (Dave) Tsai's paper on light-activated photocurrent degradation and self-healing in perovskite solar cells was published in Nat. Comm. doi:10.1038/ncomms11574. Congratulations, Wanyi Nie, Jean-Christophe Blancon and Hsinhan (Dave) Tsai!
  • Wanyi Nie's, Jean-Christophe Blancon's (internal collaborator) and Hsinhan (Dave) Tsai's paper on light-activated photocurrent degradation and self-healing in perovskite solar cells published in Nat. Comm. doi:10.1038/ncomms11574 was featured in Los Alamos National Laboratory News Release entitled "Cooling, time in the dark preserve perovskite solar power".
  • Wanyi Nie's, Jean-Christophe Blancon's and Hsinhan (Dave) Tsai's paper on light-activated photocurrent degradation and self-healing in perovskite solar cells in Nat. Comm. was featured in Energy Matters. Click here to view.
  • Ulises Martinez's and Joseph Dumont's paper on critical role of intercalated water on catalysis properties of graphene oxide in Science Advances DOI: 10.1126/sciadv.1501178 was featured in Los Alamos National Laboratory New Releases. Click here to view.
  • Wanyi Nie's, Jean-Christophe Blancon's (internal collaborator) and Hsinhan (Dave) Tsai's co-authored paper on polaron stabilization in hybrid perovskite materials was published in Nano Lett. DOI: 10.1021/acs.nanolett.6b01218.
  • Yen-Hao Lin's, Wanyi Nie's and Hsinhan (Dave) Tsai's co-authored paper on block copolymer photovoltaics through hydrogen bonding interactions was published in RCS Advances DOI: 10.1039/C6RA09041A.

April

  • Ulises Martinez's and Joseph Dumont's paper on critical role of intercalated water on catalysis properties of graphene oxide was published in Science Advances (online journal by AAAS) DOI: 10.1126/sciadv.1501178. Congratulations, Ulises Martinez and Joseph Dumont!
  • Dr. Mercouri G. Kanatzidis of Northwestern University visited our team in Los Alamos and delivered an Institute of Materials Science (IMS) Distinguished Lecture. Thank you for visiting us and giving a very exciting lecture!
  • Jean-Christophe Blancon's (internal collaborator) and Wanyi Nie's paper on electron–hole recombination dynamics on large-grain perovskite photovoltaics was published in Adv. Funct. Mater. 10.1002/adfm.201505324.
  • Arun T. Mallajosyula's (IIT Guwahati, India) and Kasun Fernando's paper on large grain perovskite solar cells by doctor blading method in aire was published in App. Mater. Today doi:10.1016/j.apmt.2016.03.002.
  • Hisato Yamaguchi's paper on electronic structure evolution of graphene oxide for optoelectronics was published in physica status solidi (a) DOI: 10.1002/pssa.201532855.

March

  • Wanyi Nie has been made a staff scientist at Los Alamos. This is due to her exceptional achievements in perovskite solar cells research. Congratulations, Wanyi Nie!

February

  • Hisato Yamaguchi’s co-authored paper on ultrafast optical study of MoS2 was published in Sci. Rep. doi:10.1038/srep21601.
  • Gautam Gupta's and Aditya Mohite's co-authored paper on Low Energy Electron Microscope (LEEM) study of MoS2 on boron nitride was published in Sci. Rep. doi:  10.1038/srep20890.

January

  • Arun T. Mallajosyula's (IIT Guwahati, India) co-authored paper on nano carbon-based solid state capacitor was published in J. Mater. Chem. A DOI: 10.1039/C5TA05552K.
2015

December

  • Dr. Fangze Liu from Northeastern University, Massachusetts joined Los Alamos as a postdoctoral associate. He will be working on 2D layered materials. Welcome, Fangze Liu!

November

  • Kendall Smith's, Yen-Hao Lin's, and Wanyi Nie's paper on molecular origin of photovoltaic performance in donor-block-acceptor all-conjugated block copolymers was published in Macromolecules DOI: 10.1021/acs.macromol.5b01383.
  • Mohit Tuteja from University of Illinois Urbana-Champaign joined our team as graduate research assistants. Welcome, Mohit Tuteja!

September

  • Arun T. Mallajosyula was offered a faculty position at IIT Guwahati, India and starting his new career there. Congratulations and best of luck, Arun T. Mallajosyula!
  • Dustin Cummins's, Ulises Martinez's, and Rajesh Kappera's paper on catalytic activity in lithium-treated core–shell MoOx/MoS2 sanowires was published in J. Phys. Chem. C doi: 10.1021/acs.jpcc.5b05640.
  • Gautam Gupta's paper on fluid and resistive tethered lipid membranes on nanoporous substrates was published in J. Phys. Chem. B DOI: 10.1021/acs.jpcb.5b04482.
  • Hsinhan (Dave) Tsai from Rice University joined our team as a graduate research assistant. Welcome back, Hsinhan (Dave) Tsai!
  • Joseph Dumont's co-authored paper on a graphite oxide (GO)-based remote readable tamper evident seal was published in Smart Materials and Structures http://iopscience.iop.org/article/10.1088/0964-1726/24/10/105014/meta.

August

  • Wanyi Nie has been selected for the new Laboratory’s Postdoc Publication Prize in “Clean Energy” for her work on solution-processed perovskite solar cells that was published in Science in January. Congratulations, Wanyi Nie!
  • Wanyi Nie gave an invited talk at SPIE NanoScience and Engineering conference held at San Diego, CA.
  • Yen-Hao Lin's and Wanyi Nie's co-authored paper on linking group influences charge separation and recombination in all-conjugated block copolymer photovoltaics was published in Advanced Functional Materials doi/10.1002/adfm.201502623.

July

  • Hsinhan (Dave) Tsai's (internal collaborator) and Wanyi Nie's paper on optimizing composition and morphology for large grain perovskite solar cell efficiency via controlling chemical reaction was published in Chem. Mater. DOI: 10.1021/acs.chemmater.5b02378.

June

  • Dr. David Mitzi of Duke University visited our team in Los Alamos. Thank you for visiting us!

May

  • We took new team photos in our town!

    TeamPhoto_CherryTree_May2015

    TeamPhoto_MountainVeiw_May2015

  • We replaced our website team photo below (from November 2013) with new one.

    TeamPhoto_Nov2013

  • Jean-Christophe Blancon (internal collaborator) gave an invited talk at CMOS Emerging technology research conference held at Vancouver, Canada.
  • Wanyi Nie's co-authored paper on current–voltage characteristics of organic heterostructure devices with insulating spacer layers was published in Organic Electronics doi:10.1016/j.orgel.2015.05.018.

April

  • Ismail Bilgin's and Fangze Liu's paper on synthesis of opto-electronic grade MoS2 was published in ACS Nano DOI: 10.1021/acsnano.5b02019.
  • Fangze Liu from Northeastern University joined our team as a graduate research assistant. Welcome, Fangze Liu!
  • Aditya Mohite's co-authored review paper on phase engineering of transition metal dichalcogenides was published in Chem. Soc. Rev. doi: 10.1039/C5CS00151J. Congratulations, Aditya Mohite!

March

  • Wanyi Nie's paper on interface design principle for high performance organic semiconductor devices was published in Advanced Science DOI: 10.1002/advs.201500024, a new online WILEY-VCH journal on selective high impact science. This manuscript took longer than usual to get it published but it is a very nice piece of study. We hope the community will like it!!
  • Dr. Claudia Narvaez Villarrubia from University of New Mexico joined our team as a Postdoctoral Associate. Welcome, Claudia Narvaez Villarrubia!

February

  • Wanyi Nie's (first-author), Hsinhan (Dave) Tsai's (internal collaborator) & Jean-Christophe Blancon's (internal collaborator) paper on high efficiency millimeter-scale crystalline perovskite solar cells published in Science was featured in Los Alamos National Laboratory official YouTube video entitled "Los Alamos Discovers Super Efficient Solar Using Perovskite Crystals" & News release entitled "Los Alamos develops new technique for growing high-efficiency perovskite solar cells"
  • Sibel Ebru Yalcin's (internal collaborator/PNNL) & Hisato Yamaguchi’s paper on direct imaging of charge transport in progressively reduced graphene oxide using electrostatic force microscopy was published in ACS Nano DOI: 10.1021/nn507150q.
  • Kasun Fernando from University of Louisville, Kunttal Keyshar from Rice University, and Raymond Fullon from Rutgers Univeristy joined our team as graduate research assistants. Welcome, Kasun Fernando, Kunttal Keyshar, and Raymond Fullon!
  • Shaivi Bhatt from University of Waterloo, Canada joined our team as undergraduate research assistants in an university's nanoscience program. Welcome, Shaivi Bhatt!

January

  • Wanyi Nie's (first-author), Hsinhan (Dave) Tsai's (internal collaborator) and Jean-Christophe Blancon's (internal collaborator) paper on high efficiency millimeter-scale crystalline perovskite solar cells was accepted in Science DOI: 10.1126/science.aaa0472. Congratulations, all!
  • Hisato Yamaguchi's & Jean-Christophe Blancon's (internal collaborator) first-authored (equally contributed) paper on spatially-resolved photoexcited carrier dynamics in phase-engineered monolayer MoS2 was published in ACS Nano DOI: 10.1021/nn506469v.
  • Hsinhan (Dave) Tsai (internal collaborator) was admitted to PhD program at Rice University. Congratulations, Hsinhan (Dave) Tsai!
2014

November

  • Rajesh Kappera’s Nature Materials paper on conversion of semiconductor to metallic phase in Layered Transition Metal Dichalcogenides (LTMDs) for Ohmic contact was featured in Editorial news of Nature Materials "Chalcogenides fill the gap" doi:10.1038/nmat4163

October

  • Dr. Swastik Kar of Northeastern University visited our team in Los Alamos. Thank you for visiting us!
  • Rajesh Kappera has been selected as a finalist for the Graduate Student Award in the Materials Research Society Fall 2014 Meeting. This secures him a silver medal but he will present his work during the Special Talk Session of the conference for the gold medal. Congratulations, Rajesh Kappera!
  • Rajesh Kappera’s paper on conversion of semiconductor to metallic phase in Chemical Vapor Deposition (CVD) atomically-thin layered transition metal dichalcogenides (LTMDs) for Ohmic contact was published in APL Materials as an invited article http://dx.doi.org/10.1063/1.4896077.

September

  • Hisato Yamaguchi's & Sibel Ebru Yalcin's (internal collaborator) co-authored paper on high spatial resolution photoluminescence (PL) spectroscopy study of oxygen-doped single-wall carbon nanotubes (SWNTs) at low temperature was published in ACS Nano DOI: 10.1021/nn504553y.
  • Hisato Yamaguchi’s co-authored paper on catalytic activities of chemically exfoliated ReS2 nanosheets was published in Nanoscale DOI: 10.1039/C4NR03740E.
  • Sibel Ebru Yalcin (internal collaborator) was offered a research position at Pacific Northwest National Laboratory.
  • Gautam Gupta's and Aditya Mohite's co-authored paper on biexciton emission from graphene-quantum dot hybrid was published in Advanced Optical Materials DOI: 10.1002/adom.201400362.

August

  • Rajesh Kappera’s paper on conversion of semiconductor to metallic phase in layered transition metal dichalcogenides (LTMDs) for Ohmic contact was published in Nature Materials doi:10.1038/nmat4080. Congratulations, Rajesh Kappera!
  • Jing Zhang joined our team as a graduate research assistant from Rice University, Texas. He will be working on catalytic properties of LTMDs.

July

  • Aditya Mohite, Gautam Gupta, and Hisato Yamaguchi were a part of the team which was awarded a Laboratory Directed Research and Development (LDRD) Directed Research (DR) grant at Los Alamos (2014-17). Our team will be working on novel application of graphene & graphene oxide thin films based on the grant. Congratulations, all!

June

  • Wanyi Nie won poster award and Hisato received honorable mention at LANL Postdoc Research Day poster competition. Wanyi's poster on “Designing high efficiency organic photovoltaics by controlling the ordering at the donor acceptor interface” was chosen as one of nine poster award recipients out of 450 postdocs at Los Alamos, Hisato Yamaguchi's poster, “Reduced graphene oxide thin films as ultrabarriers for organic electronics”, was chosen as one of ten honorable mention recipients. We were the only team that had multiple recipients. Congratulations, Wanyi Nie and Hisato Yamaguchi!

PostdocsPostdoc awards

  • Aditya Mohite (PI), Gautam Gupta, and Wanyi Nie were awarded a Laboratory Directed Research and Development (LDRD) Exploratory Research (ER) grant at Los Alamos (2014-17). Based on the grant, our team will be working on enhanced device performance of solar cells using novel nanomaterials. Congratulations, all!

May

  • Hisato Yamaguchi's and Wanyi Nie’s work on gas barrier properties of graphene oxide published in Advanced Energy Materials this year was featured twice in Los Alamos Materials Physics and Applications Division Materials Matter as an example of active research performed on two-dimensional nanomaterials at MPA (March and May 2014).

April

  • Aditya Mohite gave an invited talk at Materials Research Society Spring 2014 held at San Francisco, CA entitled "Low contact resistance electrodes for MoS2 transistors by phase engineering" in Symposium NN: 2D Materials and Devices beyond Graphene.
  • Hisato Yamaguchi was selected as one of 15 nominees for the best poster award among 900 posters presented in a session at Materials Research Society Spring 2014 held at San Francisco, CA. The poster was entitled "Reduced graphene oxide thin films as ultrabarriers for organic electronics" and was presented in Symposium OO: De Novo Graphene.
  • Gautam Gupta's and Aditya Mohite's co-authored paper on crack detection sensor layout and bus configuration analysis was published in Smart Materials and Structures.

March

  • Charudatta C. Galande defended his PhD from Rice University on his work including optical properties of graphene oxide. Congratulations, Charudatta C. Galande!
  • Our former colleague Dr. Benjamin D. Mangum visited Los Alamos to help us with the optical/optoelectronic characterization experiments. Thank you for visiting, Benjamin D. Mangum!

February

  • Charudatta C. Galande's and Aditya Mohite's paper on science and engineering of graphene oxide was published online in recently launched journal Particle & Particle Systems Characterization by WILEY-VCH Verlag GmbH & Co. (Review) DOI: 10.1002/ppsc.201300232.
  • Dr. Bruce Alphenaar of University of Louisville visited our team in Los Alamos. Thank you for visiting us!
  • Dr. Jean-Christophe Blancon from Université Claude Bernard Lyon 1, France joined LANL as a Postdoctoral Associate working with our internal collaborator, Dr. Jared J. crochet. He will be intensively working with our team on optical characterizations of nanomaterials. Welcome, Jean-Christophe Blancon!

January

  • Sidong Lei’s paper on electronic band structure and efficient photo-detection in atomically thin InSe was published in ACS Nano DOI: 10.1021/nn405036u.
  • Dr. Manish Chhowalla of Rutgers University visited our team in Los Alamos. Thank you for visiting us!
  • Ismail Bilgin joined our team as a graduate research assistant from Northeastern University. He will be working on optoelectronic properties of LTMDs. Welcome, Ismail Bilgin!
  • Wesley Jen joined our team as an undergraduate research assistant from Rutgers University. He will be working on synthesis of LTMDs. Welcome, Wesley Jen!
2013

December

  • Wanyi Nie’s paper on organic light-emitting diode (OLED) performance enhancement by use of nano graphite was published in Organic Electronics doi:10.1016/j.orgel.2013.10.032.

November

  • Wanyi Nie was awarded prestigious and competitive Director's Postdoctoral Fellowship at LANL. Wanyi, and six other fellows from around the nation, were selected from qualified candidates that reflect a broad range of disciplines in science and engineering. Wanyi will continue to work in our team with a main focus on organic photovoltaics (OPVs). Fellows receive support for two years. Congratulations, Wanyi Nie!
  • Took group photos in our town for the website.

Team

October

  • Hisato Yamaguchi's and Wanyi Nie’s paper on gas barrier properties of graphene oxide was published in Advanced Energy Materials DOI: 10.1002/aenm.201300986.
  • Went for a group hiking to Jemez Spring, NM. It snowed and was freezing cold!!

Team

Autumn

  • Dr. Arun Tej Mallajosyula joined our team as a postdoctoral associate from National University of Singapore, Singapore. He will be working on organic photovoltaics (OPVs). Welcome, Arun Tej Mallajosyula!
  • Asli Unal joined our team as a post-bachelor research assistant from UC San Diego, California. She will be working on biomaterial related projects. Welcome, Asli Unal!

August

  • Kendall Smith and Yen-Hao Lin joined our team as graduate research assistants from Rice University. They will be working on organic photovoltaics (OPVs) based on block copolymers. Welcome, Kendall Smith and Yen-Hao Lin!

Summer

  • Jennifer Gonzales joined our team as an undergraduate research assistant from University of New Mexico. She will be working on layered nanomaterial related projects. Welcome, Jennifer Gonzales!

July

  • Hisato Yamaguchi’s co-authored paper on catalytic properties of chemically exfoliated layered WS2 was published in Nature Materials doi:10.1038/nmat3700 and was featured in nanotechweb.org. Congratulations, Hisato Yamaguchi!
  • Dustin Cummins joined our team as a graduate research assistant from University of Louisville, Kentucky. He will be working on catalytic properties of layered transition metal dichalcogenides (LTMDs). Welcome, Dustin Cummins!

June

  • Daiki Watanabe joined our team as a graduate summer intern from Tohoku University, Japan. He will be working towards synthesis of layered transition metal dicalcogenides (LTMDs). Welcome, Daiki Watanabe!
  • Ethan Cheng joined our team as an undergraduate summer intern from Rutgers University, New Jersey. He will be working towards novel optoelectronic property of layered transition metal dicalcogenides (LTMDs). Welcome, Ethan Cheng!

May

  • Sibel Ebru Yalcin (internal collaborator) won poster award at LANL Postdoc Research Day poster competition. Her poster on “Electrostatic Force Microscopy (EFM) analysis of individual graphene oxide (GO) sheet upon progressive reduction” was chosen as one of nine recipients out of 450 postdocs at Los Alamos. Congratulations, Sibel Ebru Yalcin!
  • Aditya Mohite (PI), Gautam Gupta, and Hisato Yamaguchi (Co-PI) were awarded a Laboratory Directed Research and Development (LDRD) Exploratory Research (ER) grant at Los Alamos (2013-16). Our team will be working on novel optoelectronic properties of layered transition metal dicalcogenides (LTMDs) based on the grant. Congratulations, all!
  • Gautam Gupta’s paper on biological assemblies of multilayer phospholipid-silica thin films was published in ACS Nano DOI: 10.1021/nn401123p, and featured in LANL Newsroom article, "Artificial films mimic myelin sheath in new research".
  • Aditya Mohite’s co-authored paper on recent development in photophysics of single-walled carbon nanotube thin film photovoltaics was published in Physical Chemistry Chemical Physics (Perspective) DOI: 10.1039/C3CP52752B.

April

  • Sidong Lei joined our team as a graduate research assistant from Rice University, Texas. He will be working on CVD growth of novel layered materials and their optoelectronic properties. Welcome, Sidong Lei!
  • Rajesh Kappera joined our team as a graduate research assistant from Rutgers University, New Jersey. He will be working on electrical properties of layered transition metal dicalcogenides (LTMDs). Welcome, Rajesh Kappera!

January

  • Dr. Wanyi Nie joined our team as a postdoctoral associate from Wake Forest University, North Carolina. She will be working on organic photovoltaics (OPVs). Welcome, Wanyi Niei!

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