Graphene Produces More Efficient Charge Transport Inside an Organic
Semiconductor – Contact: Contact: David Barbero,
Graphene – a one-atom thick sheet of carbon – shows great
promise for future electronics. With its desirable electrical properties,
flexibility and strength, the material could enable powerful capacitors,
high-quality protective coatings and flexible transparent electronics.
Additionally, composites that combine graphene with semiconducting polymers
might enable an even wider range of advanced materials, including high
performing organic photovoltaic solar cells and transistors. A new study
performed by an international team of scientists compared the material
properties that resulted from combining graphene with semiconducting polymers.
The team found that a thin film of the prototypical semiconducting polymer
poly(3-hexylthiophene), known as P3HT, grown on top of a single layer of
graphene displayed much enhanced charge transport than the same film placed on
top of a thin layer of silicon. Read more...
Spectroscopic Evidence for the Phase Competition between the
Pseudogap and High-Tc Superconductivity –
Contact: Makoto Hashimoto,
Stanford Synchrotron Radiation Laboratory
For years, scientists have chased after the promise of high-temperature
superconductors – materials that carry current through a material with
100% efficiency. Yet the closest they have come to creating such a material
still requires temperatures more than 100 degrees Celsius below freezing. A
research team has recently published a study reporting the first direct
evidence that a mysterious phase of matter called the “pseudogap”
limits the efficiency of high-temperature superconductors. Read more...
See also: SLAC News Feature
Crystal Structures of CRISPR RNA-guided
With more viruses that infect bacteria than
any other type of biological entity, bacteria have developed a sophisticated
means of defending themselves. At the heart of their defenses is a system
called CRISPR (short for Clustered Regularly Interspaced Short Palindromic
Repeat). This portion of bacteria’s immune system takes note of attacking
viruses, and integrates fragments of the virus’ DNA into its own DNA. In
this way, CRISPRs serve as molecular vaccination cards that maintain a genetic
record of previously encountered genetic parasites. They also allow the
bacteria’s immune system to send out CRISPR-associated complexes that
home in on and destroy invading viruses. Two separate studies have
recently addressed a 405 kDa CRISPR RNA-guided surveillance complex, called
Cascade (short for CRISPR-associated complex for
antiviral defense) that is found in Escherichia
Crystal Structure of
Cascade - Contact: Scott Bailey,
Johns Hopkins University
CRISPR RNA-guided Surveillance
in Escherichia Coli -
Contacts: Ryan N. Jackson and Blake Wiedenheft, Montana State
Read Science Highlight
Scientists Search for New Ways to Deal with U.S. Uranium Ore
Excerpted from January 22, 2015 SLAC News Feature
A research team led by John Bargar at SSRL is trying to find out why uranium
persists in groundwater at former uranium ore processing sites despite
remediation of contaminated surface materials two decades ago. They think
buried organic material may be at fault, storing toxic uranium at levels that
continue to pose risks to human health and the environment, and hope their
study will pave the way for better long-term site management and protection of
the public and environment. Read more...
Upcoming Workshops and Conferences
LCLS-II Workshops, February 9-13, 2015, Menlo Park, CA
The LCLS is organizing three separate workshops during February 9-13, 2015
to advance the science case and refine the technical requirements for the
LCLS-II x-ray free electron laser project. Each of the workshops will focus on
a broad scientific area: Materials Physics, Life Sciences and Chemistry.
SSRL management encourages everyone interested in applying LCLS-II to his or
her scientific problems to attend. Separate registration is required for
each of the three workshops, but the registration is free.
For more information on each workshop including: invited speakers,
preliminary schedule and registration please visit the workshop
2015 SSRL Workshop on XAS and RIXS Data Analysis Using CTM4XAS and
CTM4RIXS, March 24-26, 2015, Menlo Park, CA
A three-day workshop on the fundamental aspects of x-ray spectroscopy,
including lectures and tutorials on the use of CTM4XAS and CTM4RIXS will be
held on March 24-26, 2015. The workshop will focus on lectures and
demonstrations by Prof. de Groot and co-workers. The workshop will also
include advanced data analysis session on participant-driven topics.
Stay tuned for the workshop web link soon to appear on the SSRL web
RapiData 2015 - Data Collection and Structure Solving: A Practical
Course in Macromolecular X-ray Diffraction Measurement, May 3-8, 2015, Menlo
RapiData 2015 is a practical course in macromolecular x-ray diffraction data
collection, data processing and structure solution. The aim of the course is to
educate and train young scientists in data collection and processing methods at
synchrotron beam lines, using state-of-the-art software and instrumentation
The course will comprise hands-on experiments at the SSRL beam lines,
software tutorials, and lectures on the following topics:
Specimen preparation, x-ray damage, tactics in data
Structure solving by MAD, SAD and Molecular replacement
Complementary methods (spectroscopy and small angle
Structural biology at x-ray free-electron lasers
For more information see the RapiData 2015 website.
The deadline for applications is February 23, 2015
12th International Conference on Synchrotron Radiation
Instrumentation, July 6-10, 2015, New York City, NY
Registration is now open for the 12th International Conference on
Synchrotron Radiation Instrumentation (SRI 2015)
The National Synchrotron Light Source ll (NSLS-ll) at Brookhaven National
Laboratory is pleased to invite you to register to attend the 12th
International Conference on Synchrotron Radiation Instrumentation (SRI) at the
Marriott Marquis Hotel in Times Square, New York City, July 6-10, 2015.
You may register at: https://www.bnl.gov/sri2015/reg/step1.php#form
16th International Conference on X-ray Absorption Fine
Structure (XAFS16), August 23-28, 2015, Karlsruhe Institute of Technology
12th International Conference on Biology and Synchrotron
Radiation (BSR) is being planned to take place in Menlo Park, CA on August
22-24, 2016. Save the Date.
Joint SSRL/LCLS Annual Users' Conference, October 7-9, 2015.
Save the Date.
New SLAC Access and Badging Procedures
User Badges are now issued at the SLAC Security Office Building 235 by the
SLAC main gate. There are additional requirements that need to be met for
users to get access to the site and the SSRL beam lines for scheduled
experiments. Please see:
A step-by-step outline is provided below:
Before traveling to SLAC, please list all experimenters who will participate
in your scheduled experiments on proposals and beam time/support requests and
inform your colleagues about access changes so that everyone coming onsite
completes the following steps:
1. Register through the user
portal to provide or update contact information.
2. Contact URA for additional requirements for users from certain
3. Ensure that you have an appropriate business visa (e.g., B1/WB Business, not B2/WT
4. Review updated SSRL user arrival and check-in procedures.
5. Complete all safety training (including Traffic Safety Course 154).
6. Stop at the Security Office Building 235 to obtain a new ID badge and/or
proximity access. Bring identification to verify citizenship.
7. Prior to entering the experimental area or starting any experiments,
check in with User Check-In Coordinator Jackie Kerlegan in the URA office in
SSRL Building 120, Room 211 (Monday-Friday 7 am - 12 noon and 1 - 4 pm (except
8. Contact the URA team for questions or assistance
SLAC Loop Road Closure
Due to construction activities the SLAC Loop Road between Starbucks and Gate
17 is expected to be closed through the end of February. Turn right at the SLAC
Sand Hill Road entrance (instead of left) and follow the Loop Road around the
main SLAC campus to enter the experimental areas through Sector 30 or Gate
Office of Science Graduate Student Research Program is Now Accepting
The Department of Energy's (DOE) Office of Science Graduate Student
Research (SCGSR) program is now accepting applications for the 2015
solicitation. Applications are due 5:00pm ET on Tuesday April 14,
The SCGSR program supports supplemental awards to outstanding U.S. graduate
students to conduct part of their graduate thesis research at a DOE national
laboratory in collaboration with a DOE laboratory scientist for a period of 3
to 12 consecutive months-with the goal of preparing graduate students for
scientific and technical careers critically important to the DOE Office of
The SCGSR program is open to current Ph.D. students in qualified graduate
programs at accredited U.S. academic institutions, who are conducting their
graduate thesis research in targeted areas of importance to the DOE Office of
Science. The research opportunity is expected to advance the graduate
students' overall doctoral thesis while providing access to the expertise,
resources, and capabilities available at the DOE laboratories. The supplemental
award provides for additional, incremental costs for living and travel expenses
directly associated with conducting the SCGSR research project at the DOE host
laboratory during the award period.
Detailed information about the program, including eligibility requirements
and access to the online application system, can be found at the SCGSR
User Research Administration
Beam Time Requests
Submit SSRL X-ray/VUV Beam Time Requests by February 20
to be considered for beam time in the scheduling period covering May through
early August 2015.
The next deadline for submitting standard
Macromolecular Crystallography proposals is April 1 and June 1 for
Submit proposals and beam time requests through the user
The Stanford Synchrotron Radiation Lightsource (SSRL) is a third-generation
light source producing extremely bright x-rays for basic and applied
research. SSRL attracts and supports scientists from around the world who
use its state-of-the-art capabilities to make discoveries that benefit society.
SSRL, a U.S. DOE Office of Science national user facility, is a Directorate of
SLAC National Accelerator Laboratory, operated by Stanford University for the
U.S. Department of Energy Office of Science. The SSRL Structural
Molecular Biology Program is supported by the DOE Office of Biological and
Environmental Research, and by the National Institutes of Health, National
Institute of General Medical Sciences. For more information about SSRL science,
operations and schedules, visit http://www-ssrl.slac.stanford.edu.
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Questions? Comments? Contact Lisa Dunn