Navigation Links
Making a gem of a tiny crystal
Date:11/27/2013

ystals they can build. The Northwestern team worked with gold nanoparticles, but the recipe can be applied to a variety of materials, with potential applications in the fields of materials science, photonics, electronics and catalysis.

A single crystal has order: its crystal lattice is continuous and unbroken throughout. The absence of defects in the material can give these crystals unique mechanical, optical and electrical properties, making them very desirable.

In the Northwestern study, strands of complementary DNA act as bonds between disordered gold nanoparticles, transforming them into an orderly crystal. The researchers determined that the ratio of the DNA linker's length to the size of the nanoparticle is critical.

"If you get the right ratio it makes a perfect crystal -- isn't that fun?" said Olvera de la Cruz, who also is a professor of chemistry in the Weinberg College of Arts and Sciences. "That's the fascinating thing, that you have to have the right ratio. We are learning so many rules for calculating things that other people cannot compute in atoms, in atomic crystals."

The ratio affects the energy of the faces of the crystals, which determines the final crystal shape. Ratios that don't follow the recipe lead to large fluctuations in energy and result in a sphere, not a faceted crystal, she explained. With the correct ratio, the energies fluctuate less and result in a crystal every time.

"Imagine having a million balls of two colors, some red, some blue, in a container, and you try shaking them until you get alternating red and blue balls," Mirkin explained. "It will never happen.

"But if you attach DNA that is complementary to nanoparticles -- the red has one kind of DNA, say, the blue its complement -- and now you shake, or in our case, just stir in water, all the particles will find one another and link together," he said. "They beautifully assemble into a three-dimensional crystal that we pre
'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Making electrical contact along 1-D edge of 2-D materials
2. ChemAxon Major Software Release brings New Desktop, Web and Visualization Applications to Power Chemistry Decision Making
3. Computational Analysis in Clinical and Preclinical Decision-Making, new webinar hosted by Xtalks
4. Advancing Preclinical Predictions, Making Faster Clinical Decisions with Cancer Models and Preclinical Imaging - World Pharma Congress this June in Philadelphia
5. Making cancer less cancerous
6. Campbell Alliance to Release New Forward-Looking Industry Report on Deal-Making Trends at the 2013 BIO International Convention
7. Engineer making rechargeable batteries with layered nanomaterials
8. 2012 Battalia Winston Survey Finds Corporate Holiday Parties are Making a Comeback
9. Making renewable viable
10. Making microscopic machines using metallic glass
11. Butamax Granted Core Patent for Making Biobutanol and Distillers Grains; Offers Producers Efficient, Low-Cost Production of Biobutanol
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/17/2014)... 2014  The In Silico Drug Discovery Conference today ... at the conference, which takes place at North Carolina ... 4, 2014. Researchers, students, drug developers, business development professionals, ... KEYNOTE SPEAKERS Ruben ... of Pharmacy Drug Discovery with Three Dimensional ...
(Date:9/17/2014)... , Sept. 17, 2014  MiMedx Group, Inc. ... processor and marketer of patent protected regenerative biomaterials ... today the publication of another peer-reviewed clinical study.    ... A Multi-center Randomized Controlled Clinical Trial Evaluating the ... Membrane Allografts and Multi-layer Compression Therapy vs. Multi-layer ...
(Date:9/17/2014)... NEWTOWN, Pa. , Sept. 17, 2014 ... services and eClinical Solutions, today announced three of its ... Conference for Clinical Data Management to be held ... Vegas, Nevada . The Company also announced the ... to raise overall quality in clinical trials acquired earlier ...
(Date:9/17/2014)... Intarcia Therapeutics, Inc. today announced ... of the cost and predictability of non-adherence in type ... Meeting of the European Association for the Study of ... Frois , Ph.D., of Analysis Group, Inc. presented data ... retrospective studies to characterize the prevalence of non-adherence and ...
Breaking Biology Technology:In Silico Drug Discovery Conference Announces Speakers and Topics 2In Silico Drug Discovery Conference Announces Speakers and Topics 3In Silico Drug Discovery Conference Announces Speakers and Topics 4In Silico Drug Discovery Conference Announces Speakers and Topics 5In Silico Drug Discovery Conference Announces Speakers and Topics 6In Silico Drug Discovery Conference Announces Speakers and Topics 7MiMedx Multi-Center Randomized, Controlled VLU Clinical Study Published In Peer-Reviewed Journal 2MiMedx Multi-Center Randomized, Controlled VLU Clinical Study Published In Peer-Reviewed Journal 3MiMedx Multi-Center Randomized, Controlled VLU Clinical Study Published In Peer-Reviewed Journal 4BioClinica to Present at 20th Annual SCDM Conference 2BioClinica to Present at 20th Annual SCDM Conference 3Intarcia Reveals New Insights At EASD Meeting Characterizing The Burden Of Poor Control And Non-Adherence To Anti-Diabetic Therapies 2Intarcia Reveals New Insights At EASD Meeting Characterizing The Burden Of Poor Control And Non-Adherence To Anti-Diabetic Therapies 3Intarcia Reveals New Insights At EASD Meeting Characterizing The Burden Of Poor Control And Non-Adherence To Anti-Diabetic Therapies 4Intarcia Reveals New Insights At EASD Meeting Characterizing The Burden Of Poor Control And Non-Adherence To Anti-Diabetic Therapies 5
... NORTH BILLERICA, Mass., March 2, 2011 Seahorse Bioscience, ... instruments for assessing cellular bioenergetics, has announced In Vitro ... XF Analyzers and consumables in Australia and New Zealand. ... first and only kinetic method to measure the two ...
... program by one of the world,s largest cities to switch ... harmful vehicle emissions in more than 5,000 vehicles and ... British Columbia study finds. The study which explores ... buses, taxis and auto-rickshaws to compressed natural gas (CNG), a ...
... 2011 Life Technologies Corporation (Nasdaq: ... management presentations to investors as part of the UBS ... is being held at the company,s headquarters in Carlsbad ... Stevenson, Life Technologies, President and Chief Operating Officer, will ...
Cached Biology Technology:Seahorse Bioscience, Inc. Appoints In Vitro Technologies Pty Ltd as New Distributor in Australia and New Zealand 2Clean fuel worsens climate impacts for some vehicle engines: UBC study 2Life Technologies to Webcast Investor Presentation as Part of the UBS West Coast Life Sciences & Diagnostics Bus Trip 2
(Date:9/17/2014)... about complex social behavior by studying nonhuman mammals and ... , With their unusually large brains relative to their ... complex social environment---not merely in a large population of ... a dynamic setting of alliances and competitors. The same ... primates, and social carnivores, like hyenas and lions. , ...
(Date:9/16/2014)... NEW YORK (17 September, 2014)More than $100 trillion ... megatons of annual carbon dioxide (CO2)a 40 percent ... by 2050 if the world expands public transportation, ... new report released by the University of California, ... Policy (ITDP). , Further, an estimated 1.4 ...
(Date:9/16/2014)... Each tree species has its own bacterial identity. That,s ... from other institutions who studied the genetic fingerprints of ... Panamanian island. , "This study demonstrates for the first ... with different ecological strategies possess very different microbial communities ... a former postdoctoral researcher in the UO,s Institute of ...
Breaking Biology News(10 mins):Being social: Learning from the behavior of birds 2Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 2Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 3Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 4Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 5Microbiome research shows each tree species has a unique bacterial identity 2
... GAINESVILLE, Fla. The percentage of electronic waste occupying our ... decade, giving rise to concerns about the toxicity of components ... of Florida are looking for ways to minimize environmental hazards ... role in the manufacture of these goods in the future. ...
... 2012  The universal adoption of biometric passports will influence ... for the global civil and military biometrics market in ... the police and the military will become a common ... is set for almost universal use in the identification ...
... and the US led by Jakob Christensen-Dalsgaard, University of Southern ... the turtle ear is specialized for underwater hearing. The new ... B March 21st , Special features of the turtle ... tympanic disk increase its sensitivity for underwater sound. Laser measurements ...
Cached Biology News:UF researchers look for ways to make an emerging technology safe for environment 2Heightened Security Threats and Economic Issues Provide Fillip to Global Civil and Military Biometrics Market, Says Frost & Sullivan 2Heightened Security Threats and Economic Issues Provide Fillip to Global Civil and Military Biometrics Market, Says Frost & Sullivan 3
... timer, SB3, Fully adjustable mixing angle, Variable ... to hold a number of different sized ... for aerating cultures, keeping biological samples in ... rotator can be used in incubators up ...
... C6 Flow Cytometer System is a full featured, ... including: the C6 Flow Cytometer, CFlow Software, and ... Flow Cytometer System provides all the capabilities of ... of the price. The C6 Flow Cytometer System ...
... II multiscreen apparatus is used to screen blots ... The apparatus can screen up to 40 different ... blot into strips. The apparatus includes a base ... one or two 8 x 7 cm membranes, ...
Fingerprinting II Informatix cluster analysis is an optional module that adds dendrogram and phylogenetic tree construction, cluster and group significance, and congruence of techniques functions to ...
Biology Products: