Navigation Links
Growth spurts
Date:8/7/2009

The veil is being lifted from the once unseen world of molecular activity. Not so long ago only the final products were visible and scientists were forced to gauge the processes behind those products by ensemble averages of many molecules. The limitations of that approach have become clear with the advent of technologies that allow for the observation and manipulation of single molecules. A prime example is the recent first ever direct observations in real-time of the growth of single nanocrystals in solution, which revealed that much of what we thought we knew is wrong.

Interim Berkeley Lab Director Paul Alivisatos and Ulrich Dahmen, director of Berkeley Lab's National Center for Electron Microscopy (NCEM), led a team of experts in nanocrystal growth and electron microscopy who combined their skills to observe the dynamic growth of colloidal platinum nanocrystals in solution with subnanometer resolution. Their results showed that while some crystals in solution grow steadily in size via classical nucleation and aggregation meaning monomer molecules collide and join together others grow in fits and spurts, driven by "coalescence events," in which small crystals randomly collide and fuse together into larger crystals. Despite their distinctly different growth trajectories, these two processes ultimately yield a nearly monodisperse distribution of nanocrystals, meaning the crystals are all approximately the same size and shape.

"Coalescence events have been previously observed in flask synthesis of colloidal nanocrystals and has been considered detrimental for achieving monodisperse colloidal nanocrystals," says Haimei Zheng, a chemist in Alivisatos' research group, who was the lead author on a paper that reported these results in the journal Science. "In our study, we found that coalescence events are frequently involved in the early stage of nanocrystal growth and yet monodisperse nanocrystals are still formed."

Says Alivisatos, a
'/>"/>

Contact: Lynn Yarris
lcyarris@lbl.gov
510-486-5375
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. AEterna Zentaris to Present at Upcoming Canaccord Adams 29th Annual Global Growth Conference
2. Orexigen(R) Therapeutics to Speak at Canaccord Adams Global Growth Conference
3. Shire plc: Core Portfolio of Products Delivers 20% Sales Growth
4. VIVUS to Present at the Canaccord Adams 29th Annual Global Growth Conference
5. Optimer Pharmaceuticals to Present at the Canaccord Adams 29th Annual Global Growth Conference
6. Cardium Announces New Orthobiologics Product Initiative Extending Gene Activated Matrix Technology to Deliver Bone Growth Factors
7. NovaBay(R) Pharmaceuticals to Present at Jesup & Lamont 2009 Growth Stock Conference
8. Histogen Hair Regrowth Clinical Trial Presented at ISHRS Annual Meeting
9. Growing Awareness and Increased Investments Lead to Growth of Biotechnology Applications in the Food & Beverage and Dietary Supplements Sector, Reveals Frost & Sullivan
10. Peregrine Pharmaceuticals to Present at the Jesup & Lamont 2009 Growth Stock & National Sales Conference
11. Sundia in Top 100 Fast-growth Outsourcing Companies in China
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Growth spurts
(Date:7/10/2014)... 2014 Robert Harman, DVM, Founder and CEO ... proud to announce the relaunch of his highly informative blog, ... series called “ What are Stem Cells ?” Dr. ... straightforward foundation in the basics of stem cell therapy so ... right type of treatment when considering regenerative medicine. , A ...
(Date:7/10/2014)... July 10, 2014 Senior supply chain ... professional associations, addressed the challenges of “Reducing Cost, Lead ... Industries” through strategic sourcing. Describing the partnership of the ... Supply Chain Management Institute ( SCMI) of the ... June 24 at the Kroc Institute of Peace and ...
(Date:7/10/2014)... July 10, 2014  Kainos Capital, a firm specializing ... announced that it has acquired the Slim-Fast brand from ... business. Terms of the transaction were not disclosed. ... replacement business that markets ready-to-drink shakes, powders, bars and ... and in the United Kingdom ...
(Date:7/10/2014)... July 10, 2014   Ceres, Inc . (Nasdaq: ... company, announced today financial results for the three months ... its business. Ceres reported that the company ... performance this growing season in Brazil, which concluded in ... company,s sorghum evaluation areas for part of the growing ...
Breaking Biology Technology:Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Kainos Capital Acquires Slim-Fast From Unilever 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9
... students for work in ... medical manufacturing, COLUMBUS, Ohio, ... other consumer products are being leveraged by,Ohio,s growing bioscience industry to ... of skilled labor to sustain,the unprecedented growth of the bioscience industry, ...
... 30 Vanda Pharmaceuticals,Inc. (Nasdaq: VNDA ), ... of clinical-stage product candidates for central,nervous system disorders, ... quarter ended September 30, 2008., Vanda reported ... of 2008 of $3.8 million, compared to $5.5 ...
... DIEGO, Oct. 30 Prometheus Laboratories Inc., ... the U.S.,Patent and Trademark Office (USPTO) has ... PROMETHEUS(R) Thiopurine Metabolites, a,diagnostic test that enables ... reach and maintain desired therapeutic levels. The ...
Cached Biology Technology:Rapidly Expanding Ohio Bioscience Industry Drives New Workforce Training Program 2Rapidly Expanding Ohio Bioscience Industry Drives New Workforce Training Program 3Vanda Pharmaceuticals Reports Third Quarter 2008 Results 2Vanda Pharmaceuticals Reports Third Quarter 2008 Results 3Vanda Pharmaceuticals Reports Third Quarter 2008 Results 4Vanda Pharmaceuticals Reports Third Quarter 2008 Results 5Vanda Pharmaceuticals Reports Third Quarter 2008 Results 6Vanda Pharmaceuticals Reports Third Quarter 2008 Results 7Vanda Pharmaceuticals Reports Third Quarter 2008 Results 8Vanda Pharmaceuticals Reports Third Quarter 2008 Results 9Vanda Pharmaceuticals Reports Third Quarter 2008 Results 10Prometheus Strengthens Intellectual Property Portfolio with Newly Issued Patents for Thiopurine Metabolite Testing 2
(Date:7/10/2014)... June 27, 2014  Pomerantz LLP has filed ... ("Provectus" or the "Company")(NYSE-MKT: PVCT) and certain of ... States District Court, Middle District of ... of a class consisting of all persons or ... between December 17, 2013 and May 22, 2014, ...
(Date:7/10/2014)... July 2, 2014 It is a great ... the appointment of the world-renowned Thoracic and Cardiovascular surgeon, ... Dr. Ginsburg, with over 34 years of ... Hospital and Good Samaritan Regional Medical Center. Dr. Ginsburg ... late 1980,s and is considered an expert in the ...
(Date:7/10/2014)... , July 7, 2014 Fingerprint Cards, ... major design win (DW). A Chinese Top 5 smartphone OEM ... start of mass production in October 2014.   ... Top 5 smartphone OEM, which has a planned date for ... target sales volume for this phone of 3 million units. ...
Breaking Biology News(10 mins):SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 2SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 3Avery Biomedical Devices, Inc. announces the appointment of Mark E Ginsburg, M.D. to its Board of Directors 2FPC Wins DW for 1021 Touch Sensor for Flagship Smartphone from Chinese Top 5 Smartphone OEM 2
... (October 5, 2010) -- Protein molecules inside cells ... forces exerted by all the other molecules in ... models are necessarily built around much greater driving ... Journal of Chemical Physics investigates the ...
... State University researchers have discovered a rare oasis of life ... bottom of Yellowstone Lake. A colony of moss, worms ... the water is inky black, about 90 degrees Fahrenheit, and ... in the September issue of Geobiology. The vent is ...
... Oct. 4, 2010 -- Supercomputer simulations at the Department of ... nucleic acids could have contributed to the origins of life. ... who directs ORNL,s Center for Molecular Biophysics and holds a ... to probe an organic chemical reaction that may have been ...
Cached Biology News:Montana State team finds rare oasis of life on floor of Yellowstone Lake 2Montana State team finds rare oasis of life on floor of Yellowstone Lake 3Montana State team finds rare oasis of life on floor of Yellowstone Lake 4Powerful supercomputer peers into the origin of life 2
Collected from 8-12 week old New Zealand or Californian rabbits. Aseptically collected and processed to minimize hemolytic activity. Pricing: $60/unit for 1 - 10 units...
Donor Goat Serum...
GeneRacer is an advanced RACE (rapid amplification of cDNA ends) technique that improves the efficiency of amplifying full-length 5' and 3' cDNA ends. With the GeneRacer Kit you can:...
One-step, microplate or cuvet, colorimetric, linear detection range 0.7 mg/dL to 35 mg/dL. Procedure: 5 min....
Biology Products: