Navigation Links
Study improves understanding of surface molecules in controlling size of gold nanoparticles
Date:6/18/2012

North Carolina State University researchers have shown that the "bulkiness" of molecules commonly used in the creation of gold nanoparticles actually dictates the size of the nanoparticles with larger so-called ligands resulting in smaller nanoparticles. The research team also found that each type of ligand produces nanoparticles in a particular array of discrete sizes.

"This work advances our understanding of nanoparticle formation, and gives us a new tool for controlling the size and characteristics of gold nanoparticles," says Dr. Joseph Tracy, an assistant professor of materials science and engineering at NC State and co-author of a paper describing the research. Gold nanoparticles are used in industrial chemical processes, as well as medical and electronics applications.

When creating gold nanoparticles, scientists often use organic molecules called ligands to facilitate the process. The ligands effectively bring gold atoms together in a solution to create the nanoparticles. In the process, ligands essentially line up side by side and surround the nanoparticles in all three dimensions.

The researchers wanted to see whether the bulkiness of the ligands affected nanoparticle size, and opted to assess three types of thiol ligands a family of ligands commonly used to synthesize gold nanoparticles. Specifically, the molecules bound to the gold nanoparticles are linear hexanethiolate (-SC6), cyclohexanethiolate (-SCy) and 1-adamantanethiolate (-SAd). Each of these ligands has a bulkier configuration than the last.

For example, picture each ligand as a slice of pie, with a gold atom attached to the pointed end. -SC6 looks like a very narrow slice of pie. -SCy is slightly larger, and -SAd is the largest of the three with the "crust" end of the pie wedge far wider than the pointed end.

The researchers found that the bulkiness of the ligands determined the size of the nanoparticles. Because fewer -SAd and -SCy ligands
'/>"/>

Contact: Matt Shipman
matt_shipman@ncsu.edu
919-515-6386
North Carolina State University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Positive Clinical Study Results for BSPs HyperQ Technology
2. 15-Minute Data From Phase 3 Study of Avanafil Featured as a Late Breaking Abstract at SMSNA Annual Meeting
3. DermTechs Non-invasive Melanoma Detection Assay Poised to Enter Clinical Validation Study
4. Marshall study shows nanoparticles used as additives in diesel fuels can travel from lungs to liver
5. Clionsky Neuro Systems (CNS-Neuro) Announces Publication of Study Finding Elderly Patients Unable to Recognize Their Memory Loss
6. Convergence Pharmaceuticals Initiates Phase I Multiple Ascending Dose Study for CNV2197944
7. AtheroNova Inc. Preclinical Study Demonstrates 95% Reduction in Arterial Plaque Formation
8. Singapore scientists lead human embryonic stem cell study
9. GeneTex Antibody Company to Launch New Line of Primary Antibodies for the Study of Spindle Assembly
10. Nutra Pharma Announces Publication of a New Mechanism Study of Alpha-Cobratoxin in the Treatment of Pain
11. Metabolex Announces Positive Results From its Clinical Study of Arhalofenate in Combination With Febuxostat
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study improves understanding of surface molecules in controlling size of gold nanoparticles
(Date:8/20/2014)... The 6th Annual Arrowhead Personalized and ... 29-30 in San Francisco, CA. This year’s conference brings ... and clinicians focused on addressing and solving the significant ... twelve years since the sequencing of the human genome, ... pharmacogenetic information in the label and molecular diagnostics have ...
(Date:8/20/2014)... your ear could improve the health of your heart, ... of Leeds used a standard TENS machine like those ... to the tragus, the small raised flap at the ... ear canal. , The stimulation changed the influence of ... nervous signals that can drive failing hearts too hard. ...
(Date:8/19/2014)... 20, 2014 One of the ... is an inadequate vascular supply. Nutrient and gas ... tissues is critical for successful regeneration and integration ... mitigate deficiencies in vascularization and promote angiogenesis in ... optimizing scaffold design and architecture, and enhancing scaffolds ...
(Date:8/19/2014)... Pa. , Aug. 19, 2014 A ... has been nominated for a Centers for Disease Control ... addressing a major public health concern. ... System, is one of a team of researchers nominated ... Charles C. Shepard Science Award for Data Methods and ...
Breaking Biology Technology:6th Annual Personalized and Precision Medicine Conference Bringing Together Thought Leaders to Discuss Clinical Implementation, Dx Reimbursement, Big Data, and Sequencing 2'Tickling' your ear could be good for your heart 2Vascularization in Tissue Engineering Highlighted at 12th New Jersey Symposium on Biomaterials Science 2Geisinger investigator nominated for federal award 2Geisinger investigator nominated for federal award 3
... ZymoGenetics, Inc. (Nasdaq:,ZGEN) announced that the company ... update on the regulatory review of recombinant thrombin,(rThrombin). ... on August 22 at 5:00,p.m. Eastern Time by ... the call approximately 10 minutes prior to,the scheduled ...
... Missourians Introduce New Ballot Initiative to Pursue Cures for Patients, ... without involving controversial Human Cloning, WASHINGTON, Aug. ... Missouri to ensure that taxpayer funds,support cures for patients, without ... Research Council, issued the,following statement on the new initiative, Cures ...
... The U.S. Food and Drug,Administration (FDA) today approved ... ages 13-17 and for the short-term,treatment of bipolar ... I disorder in children and adolescents ages 10-17. ... more than 430 adolescents,ages 13-17, in the treatment ...
Cached Biology Technology:ZymoGenetics Will Hold Conference Call Today at 5:00 p.m. Eastern Time to Provide Update on rThrombin 2FDA Approves RISPERDAL(R) to Treat Adolescents with Schizophrenia and Children and Adolescents with Bipolar Mania 2FDA Approves RISPERDAL(R) to Treat Adolescents with Schizophrenia and Children and Adolescents with Bipolar Mania 3
(Date:8/20/2014)... bags could one day be made out of cocoa, ... now reporting. The novel process they developed and their ... agricultural and plastic waste problems, appear in the ACS ... Bayer and colleagues at the Italian Institute of Technology ... 2012, its production reached 288 million tons worldwide, but ...
(Date:8/20/2014)... When a colony of honeybees grows to about 4,000 ... reproductive cycle: the building of a special type of ... team of experts from the Department of Neurobiology and ... what starts the reproductive cycle of honeybee colonies. The ... The Science of Nature . , Reproduction isn,t ...
(Date:8/20/2014)... POINT ROBERTS, Washington , August 20, 2014 ... Addressing Security Concerns in the Payment Industry?   ... leading sectors including biometrics, issues commentary from analysts and experts ... Peaslee , Managing Partner at Thrive Analytics, Isabelle Moeller ... CEO of NXT-ID, Inc. (OTCBB: NXTD) ( OTCQB:NXTD ), a ...
Breaking Biology News(10 mins):Worker bees 'know' when to invest in their reproductive future 2Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 2Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 3Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 4Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 5Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 6Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 7
... the Institute for Stem Cell Biology and Medicine have demonstrated ... be genetically manipulated and coaxed to develop into mature T-cells, ... The study, to be published the week of July 3 ... Academy of Sciences, found that it is possible to convert ...
... skyrocketed from 497 cases reported in 1982 (the first year ... , Lyme disease, like other zoonoses, is ... a blood meal from a vertebrate host. In the eastern ... blacklegged ticks, Ixodes scapularis, which feed on a wide variety ...
... University of North Carolina at Chapel Hill has identified ... potentially dangerous interactions with certain medications. , For almost ... and pharmacists to avoid grapefruit juice if they are ... control blood pressure or lower cholesterol. Studies have shown ...
Cached Biology News:UCLA researchers develop T-cells from human embryonic stem cells 2A new view on Lyme disease: Rodents hold the key to annual risk 2A new view on Lyme disease: Rodents hold the key to annual risk 3Study identifies substances in grapefruit juice that interact dangerously with some drugs 2
TEMPLIPHI HT SEQ AMPL KIT, 1 EA. Category: Sequencing Template Amplification....
This Malachite Green Phosphate Detection Kit...
Request Info...
1+ mg expected yield of purified protein, expressed in insect cells - excludes cDNA...
Biology Products: