aspuru-list February 2017

aspuru-list@lists.fas.harvard.edu

20 participants
56 discussions

[Aspuru-Guzik Group List] Group Meeting Rescheduled to Tomorrow, Pfizer 4:15PM.

by Siria Serrano

Dear Group Members, We are rescheduling today's group meeting with Professor Christoph Brabec to tomorrow, Friday, February 10th at Pfizer 4:15 PM. Cheers, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

7 years, 2 months

[Aspuru-Guzik Group List] Boston Area Excitonics Seminar Postponed

by Doran Bennett

Dear Excitonics Community - Unfortunately due to the forcasted weather conditions tomorrow we will have to postpone the inaugural Boston Area Excitonics Seminar to a future date. We are working to coordinate schedules and we will communicate the new date and time shortly. Stay warm tomorrow- Doran and Christoph *Doran I. G. Bennett* Harvard University, Department of Chemistry CIFAR Postdoctoral Fellow Bio-inspired Light Harvesting Program

7 years, 2 months

[Aspuru-Guzik Group List] Group meeting, Thu Feb 09, 3:30 PM, Div Room

by Ian Kivlichan

Hi all, Tomorrow Prof. Christoph Brabec from Friedrich-Alexander University Erlangen-Nürnberg will talk at group meeting. See below for his title and abstract. All the best, Ian ----------------- *High Throughput Material and Processing Concepts for Printed Photovoltaics* *Christoph J. Brabec* i-MEET, Department of Material Science, Friedrich-Alexander University Erlangen-Nurnberg, Erlangen, D- 91058 Germany ZAE Bayern e.V., Renewable Energies, D-91058 Erlangen, Germany Solution processed semiconductors play an essential role in the future renewable energy scenarios where power generation by photovoltaics will be one of the pillars for the world´s clean energy supply. The printed organic photovoltaics technology has evolved from the 1 % regime in the 90s to the 10 % regime nowadays. Perovskite semiconductors have lead the efficiency pathway of printed semiconductors beyond the 20 % regime. Most interestingly, some candidates of the most recent generation of high performance materials show a number of unforeseen microstructure related degradation mechanisms, which are closely related to their performance. This presentation will outline the fundamentals of printed PV and reflect the current state of the art, the roadmaps and the application fields of this technology. Several concepts will be discussed in more detail, among them the organic BHJ technology as well as the perovskite technology. A joint roadmap towards a green, renewable & sustainable energy scenario will be introduced, highlighting the potential of printed PV to cover mobile, integrated as well as installed power applications. Recent advances in material and device processing have opened a venue to introduce high-throughput and combinatorial methods into the photovoltaics research. First experimental investigations underpin the complexity to introduce high throughput systematics as a concept for device engineering as compared to material designing. The last part of the presentation will introduce into the concept of robot based systems as a hardware platform for high throughput device engineering.

7 years, 2 months

[Aspuru-Guzik Group List] Fwd: Mentoring Harvard undergraduate science researchers

by Alan Aspuru-Guzik

See workshops below A ---------- Forwarded message --------- From: Babakhanyan, Anna <ababakhanyan(a)fas.harvard.edu> Date: Wed, Feb 8, 2017 at 12:56 PM Subject: Mentoring Harvard undergraduate science researchers To: Aspuru-Guzik, Alan <aspuru(a)chemistry.harvard.edu> Dear Dr. Aspuru-Guzik, *Are you interested in mentoring Harvard undergraduates in 2017?* Harvard’s Undergraduate Science Education Office in the Faculty of Arts & Sciences provides advising and support to Harvard undergraduate students who are interested in conducting independent research. It is also our mission to assist Harvard-affiliated professors and scientists who seek to mentor undergraduates. We can help you: · compose and publicize your group’s undergraduate research opportunities · identify internal and external funding resources to support undergraduate students · direct your researchers to our series of scientific mentoring workshops <http://lifesciences.fas.harvard.edu/mentoring-workshops> for graduate student and postdoctoral research mentors *Contact information:* *For assistance in publicizing undergraduate and post-bac research opportunities or funding questions:* Anna Babakhanyan, PhD, MBT Undergraduate Science Research Advisor ababakhanyan(a)fas.harvard.edu *For information on our mentoring workshops series:* Margaret A. Lynch, PhD Associate Director of Science Education margaretlynch(a)fas.harvard.edu *Visit us at: *Science Education Office Faculty of Arts and Sciences, Harvard University 16 Divinity Avenue, BioLabs Room 1087 Cambridge, MA 02138 http://lifesciences.fas.harvard.edu/research -- Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M138 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru

7 years, 2 months

[Aspuru-Guzik Group List] Fwd: Fw: Today's visit by Milan Randic

by Alan Aspuru-Guzik

See below from Yudong. May interest all ML people in the group, alan Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology | Harvard University 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu ---------- Forwarded message ---------- From: Cao, Yudong <yudongcao(a)fas.harvard.edu> Date: Wed, Feb 8, 2017 at 9:43 AM Subject: Fw: Today's visit by Milan Randic To: "Aspuru-Guzik, Alan" <aspuru(a)chemistry.harvard.edu> [image: SaneBox] *SaneAttachments*: The attachments in this email have been copied to Dropbox by the magic of SaneBox <http://sanebox.com>. Click link bellow: Book Review match76n2_525-528.pdf <https://db.tt/wtXbKvfwNk> - Dropbox/SaneBox/Cao, Yudong/Fw_ Today's visit by Milan Randic, 2017-02-08 09.43.52 AM/ * Click the link above or find it in Dropbox with the path of the file provided next to the link. You can also forward this email as usual. Learn more <http://help.sanebox.com/customer/portal/articles/473528-sane-attachments>. You still see the original attachments because some attachments are impossible to strip. * ------------------------------ Hi Alan, I met with Dudley Herschbach yesterday and he mentioned he has a visitor today doing "chemical graph theory" (attached). As a CS person I am naturally interested in any graph theory. But if you think this might be useful for other group members (for example the ML subgroup might be interested in this because of the molecular representation they use in their machine learning algorithms). Anyway, I am just sharing this information and feel free to invite other group members to join. Regards, Yudong ------------------------------ *From:* Dudley Herschbach <dherschbach(a)gmail.com> *Sent:* Wednesday, February 8, 2017 8:21 AM *To:* Cao, Yudong *Subject:* Today's visit by Milan Randic Hi Yudong, I haven't heard yet from Milan, altho in his email last week he said the expected to come today between 2 and 3 PM. Will let you know. Thought you might like to see a review of his book that he sent to me (attached below). If Alan or anyone else in his group would like to meet Milan, we could easily arrange to meet in a less cluttered room than my office! Best wishes, Dudley

7 years, 2 months

[Aspuru-Guzik Group List] RV: [Postdocs] FW: TODAY at 5pm! Mario Molina on "Air Pollution in Megacities: From Mexico City to Beijing"

by Flores Leonar, Martha Magdalena

________________________________ De: ccb_postdocs-bounces(a)lists.fas.harvard.edu <ccb_postdocs-bounces(a)lists.fas.harvard.edu> en nombre de Schwickrath, Helen L. <schwickrath(a)chemistry.harvard.edu> Enviado: miércoles, 8 de febrero de 2017 9:20 Para: 'ccb_postdocs(a)lists.fas.harvard.edu'; 'ccb-gradstudents-list(a)lists.fas.harvard.edu'; CCB Staff; othergradstudents at Chemistry Asunto: [Postdocs] FW: TODAY at 5pm! Mario Molina on "Air Pollution in Megacities: From Mexico City to Beijing" Of possible interest -- From: Nault, Kellie Corcoran Sent: Wednesday, February 08, 2017 8:38 AM To: Schwickrath, Helen L. <schwickrath(a)chemistry.harvard.edu> Cc: Chan, Tiffany W <tiffanychan(a)seas.harvard.edu> Subject: TODAY at 5pm! Mario Molina on "Air Pollution in Megacities: From Mexico City to Beijing" Hi Helen, Dr. Mario Molina is presenting his university-wide talk today at 5pm, and if you are able to help us remind folks in your CCB community, we would be grateful! Announcement below. Thanks so much, Kellie Kellie Corcoran Nault COMMUNICATIONS CONSULTANT Harvard-China Project on Energy, Economy and Environment John A. Paulson School of Engineering & Applied Sciences HARVARD UNIVERSITY PIERCE HALL G3F, 29 OXFORD STREET CAMBRIDGE, MA 02138 email: knault(a)fas.harvard.edu<mailto:knault@fas.harvard.edu> website: chinaproject.harvard.edu<http://www.chinaproject.harvard.edu/> View this email in your browser<https://urldefense.proofpoint.com/v2/url?u=http-3A__us14.campaign-2Darchive…> [cid:image001.jpg@01D281EC.94744B00]<http://chinaproject.harvard.edu/> “Air Pollution in Megacities: From Mexico City to Beijing” Mario Molina Distinguished Professor, Department of Chemistry and Biochemistry and Scripps Institution of Oceanography, University of California, San Diego; Nobel Prize in Chemistry 1995 Wednesday, February 8, 2017 5:00-6:00pm Science Center C 1 Oxford Street, Cambridge View on a Map<http://map.harvard.edu/?ctrx=759749&ctry=2962403.5&level=9&layers=Campus%20…> Professor Mario Molina<https://urldefense.proofpoint.com/v2/url?u=http-3A__www-2Dchem.ucsd.edu_fac…> is a renowned atmospheric chemistry and environmental scientist, born in Mexico City. He earned the Nobel Prize in Chemistry in 1995 for discovering how chlorofluorocarbons (CFCs) deplete the ozone layer. He is Distinguished Professor of Chemistry and Biochemistry at the University of California, San Diego (UCSD), President of the Mario Molina Center for Strategies Studies on Energy and the Environment in Mexico City, and was formerly an Institute Professor at the Massachusetts Institute of Technology (MIT). He served on President Clinton’s and President Obama’s Committee of Advisors in Science and Technology. Professor Molina is a member of the U.S. National Academy of Sciences and the National Academy of Medicine, and of the Pontifical Academy of Sciences of the Vatican. Professor Molina has received the Presidential Medal of Freedom and more than 40 honorary degrees, as well as numerous awards for his scientific work. About Dr. Molina's Talk: In addition to researching the chemical properties of atmospheric pollution in the upper and lower atmosphere, Dr. Molina is also actively collaborating with colleagues across disciplines on the science and policy connected with air quality and global climate change issues. In this public lecture, Dr. Molina will address the challenges for air quality and public health posed by air pollution problems in megacities, using Mexico City and Beijing as examples. Co-Sponsored by: Harvard-China Project on Energy, Economy and Environment<http://chinaproject.harvard.edu/>, Harvard John A. Paulson School of Engineering and Applied Sciences; Department of Environmental Health<https://www.hsph.harvard.edu/environmental-health/>, Harvard T.H Chan School of Public Health; Harvard University Center for the Environment<http://www.environment.harvard.edu/>; Harvard Global Institute<http://globalinstitute.harvard.edu/> Contact: Tiffany Chan, tiffanychan(a)seas.harvard.edu<mailto:tiffanychan@seas.harvard.edu> Learn More<http://chinaproject.harvard.edu/> Copyright © 2017 Harvard University, All rights reserved. Harvard-China Project on Energy, Economy and Environment Harvard Paulson School of Engineering and Applied Sciences Pierce Hall G3F 29 Oxford Street Cambridge, MA 02138

7 years, 2 months

[Aspuru-Guzik Group List] Mioy Huynh visit

by Jennifer Wei

Hi everyone, Mioy Huynh from the Hammes-Schiffer Group is coming for a postdoc candidate interview on Monday, Feb. 13th. He will be giving a special group meeting at 3pm on that day. Please see attached for his abstract. Please let me know if you are interested in meeting Mioy, and/or having lunch with him. I have a limited number of spots available. Best, Jennifer

7 years, 2 months

[Aspuru-Guzik Group List] [qip] Talk at Harvard tomorrow - Wed, Feb 8, 4:30pm

by Aram Harrow

*Matthew Headrick (Brandeis) will be speaking on "Quantum entanglement, classical gravity, and convex programming: New connections” at next Wednesday’s CMSA Colloquium, * *2/8@4:30pm* *20 Garden Street room G10.* *Abstract:* In recent years, developments from the study of black holes and quantum gravity have revealed a surprising connection between quantum entanglement and classical general relativity. The theory of convex programming, applied in the differential-geometry setting, turns out to be useful for understanding what's behind this correspondence. We will describe these developments, giving the necessary background in quantum information theory and convex programming along the way. _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

7 years, 2 months

[Aspuru-Guzik Group List] Excitonics Seminar: Tues. Feb 7, 4:30 pm in 36-428

by Catherine M Bourgeois

CENTER FOR EXCITONICS SEMINAR SERIES: Nano- and single-crystals of lead halide perovskites: from bright light emission to hard radiation detection February 7, 2017 at 4:30pm/36-428 RLE Haus Room Maksym Kovalenko ETH Zurich, Department of Chemistry [http://www.rle.mit.edu/excitonics/wp-content/uploads/2016/06/Kovalenko4-1-2…] Chemically synthesized inorganic nanocrystals (NCs) are considered to be promising building blocks for a broad spectrum of applications including electronic, thermoelectric, and photovoltaic devices. We have synthesized monodisperse colloidal nanocubes (4-15 nm edge lengths) of fully inorganic cesium lead halide perovskites (CsPbX3, X=Cl, Br, and I or mixed halide systems Cl/Br and Br/I) using inexpensive commercial precursors [1]. Their bandgap energies and emission spectra are readily tunable over the entire visible spectral region of 410-700 nm. The photoluminescence of CsPbX3 NCs is characterized by narrow emission line-widths of 12-42 nm, wide color gamut covering up to 140% of the NTSC color standard, high quantum yields of up to 90% and radiative lifetimes in the range of 4-29 ns. Post-synthestic chemical transformations of colloidal NCs, such as ion-exchange reactions, provide an avenue to compositional fine tuning or to otherwise inaccessible materials and morphologies. While cation-exchange is facile and commonplace, anion-exchange reactions have not received substantial deployment. We observed fast, low-temperature, deliberately partial or complete anion-exchange in CsPbX3 NCs. By adjusting the halide ratios in the colloidal NC solution, the bright photoluminescence can be tuned over the entire visible spectral region (410-700 nm). Furthermore, fast inter-NC anion-exchange is demonstrated as well, leading to uniform CsPb(Cl/Br)3 or CsPb(Br/I)3 compositions simply by mixing CsPbCl3, CsPbBr3 and CsPbI3 NCs in appropriate ratios. We also present low-threshold amplified spontaneous emission and lasing from CsPbX3 NCs [3]. We find that room-temperature optical amplification can be obtained in the entire visible spectral range (440-700 nm) with low pump thresholds down to 5±1 µJ cm-2 and high values of modal net gain of at least 450±30 cm-1. Two kinds of lasing modes are successfully realized: whispering gallery mode lasing using silica microspheres as high-finesse resonators, conformally coated with CsPbX3NCs, and random lasing in films of CsPbX3 NCs. We also demonstrated that 0.3-1 cm, solution-grown single crystals (SCs) of semiconducting hybrid lead halide perovskites (MAPbI3, FAPbI3 and I-treated MAPbBr3, where MA=methylammonium, FA=formamidinium) can serve as solid-state gamma-detecting materials detectors (e.g. for direct sensing of photons with energies as high as mega-electron-volts, MeV) [4]. This possibility arises from a high mobility(µ)-lifetime(τ) product of 1.0-1.8 10-2 cm2 V-1, low dark carrier density of 109 – 1011 cm-3 and low density of charge traps of 109 – 1010 cm-3, and a high absorptivity of hard radiation by the lead and iodine atoms. We demonstrated the utility of perovskite detectors for testing the radio-purity of medical radiotracer compounds such as 18F-fallypride. Energy-resolved sensing at room temperature is presented using FAPbI3 single crystals (SCs) and an 241Am source. With FAPbI3SCs, that amongst all tested crystals exhibit highest mobility-lifetime product and lowest noise levels and dark currents, a portable dosimetry prototype is demonstrated. [http://www.rle.mit.edu/excitonics/wp-content/uploads/2016/06/kovalenko-r-im…]<http://www.rle.mit.edu/excitonics/wp-content/uploads/2016/06/kovalenko-r-im…> 1. Protesescu et al. Nano Letters 2015, 15, 3692–3696 2. Nedelcu et al. Nano Letters 2015, 15, 5635–5640 3. Yakunin et al. Nature Communications 2015, 9, 8056. 4. Yakunin et al. Nature Photonics 2016, doi:10.1038/nphoton.2016.139 Maksym V. Kovalenko has been tenure-track Assistant Professor of Inorganic Chemistry at ETH Zürich (Swiss Federal Institute of Technology) since July 2011. His group is also partially hosted by Empa (Swiss Federal Laboratories for Materials Science and Technology) to support his highly interdisciplinary research program. He studied chemistry in Ukraine (1999-2004, Chernivtsi National University). His doctoral studies took place in Austria (2004-2007, Institute of Solid State Physics, Johannes Kepler University, Linz, with Prof. Wolfgang Heiss). He then moved to USA (2008-2011, Department of Chemistry, University of Chicago, with Prof. Dmitri Talapin). His present scientific focus is on the development of new synthesis methods for inorganic nanomaterials, their surface chemistry and assembly into macroscopically large solids. His ultimate, practical goal is to provide novel inorganic materials for photonics and optoelectronics, as well as for rechargeable Li-ion batteries and post-Li-electrochemistries. Recently, his group pioneered the synthesis of highly luminescent colloidal nanomaterials of cesium lead halide perovskites, which hold great potential for applications in display technologies and for lighting. With much larger forms of lead halide perovskites – inch-sized single-crystals – he recently demonstrated sensitive detection of hard radiation (hard X-rays and gamma photons). He is the recipient of an ERC Starting Grant 2012, Ruzicka Preis 2013 and Werner Prize 2016. He published over 110 articles in peer-reviewed journals, co-authored 3 book chapters, and is listed as inventor in 8 patents. Research<http://www.old-lac.ethz.ch/kovalenko/people_professor.html> The Center For Excitonics Is An Energy Frontier Research Center Funded By The U.S. Department Of Energy, Office Of Science And Office Of Basic Energy Sciences Light refreshments will be served.

7 years, 2 months

[Aspuru-Guzik Group List] Reminder talk right now by Leanne Chen postdoctoral candidate

by Alan Aspuru-Guzik

7 years, 2 months

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aspuru-list February 2017