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:1/22/2015)... , Jan. 22, 2015   Cypher Genomics, Inc., ... Inc. (NASDAQ: SQNM ), the leading ... for next generation noninvasive prenatal tests (NIPT). Through ... technology, called Mantis™, to advance analysis of clinically-relevant ...
(Date:1/22/2015)... , Jan. 22, 2015  Derma Sciences, Inc. ... company focused on advanced wound care, announces that ... tissues, have been added to the Premier, Inc. ... the opportunity for the AMNIOEXCEL® and AMNIOMATRIX® product ...
(Date:12/24/2014)... , Dec. 24, 2014 PlasmaTech Biopharmaceuticals, Inc. (NASDAQ: PTBI, ... announced the closing of an underwritten public offering of 3,500,000 ... an aggregate 3,500,000 shares of common stock, at an offering ... warrants have a per share exercise price of $5.00, are ...
(Date:12/24/2014)... 2014 “Preparative & Process Chromatography ... Consumables (Columns, Solvents, Buffers, Valves, Guages, Seals), Accessories, ... - Forecasts to 2019” provides a detailed overview ... market trends, and strategies impacting the preparative and ...
Breaking Biology Technology:Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 2Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 3Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 4Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 5PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 2Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 4
... Wis. Wisconsin businesses and individuals are invited ... Products Awards Competition, which recognizes benefits coming from ... technologies. , ,Governor's New Products Awards are ... or more employees); large companies (500-999 employees); medium ...
... latest business venture of Mike Strand in Eau Claire ... competition, has landed $250,000 from the Chippewa Valley ... has a plan to put video screens showing advertising ... the statewide business-plan competition finals, it won the emerging ...
... Wis. — Sonic Foundry posted mixed financial numbers for ... while still posting a net loss. , ,Revenues were $8.3 ... with unit sales up 74 percent, owing to multiple unit ... , ,Operating expenses increased by 20 percent, however, and the ...
Cached Biology Technology:
(Date:12/22/2014)... 2014  NXT-ID, Inc. (NASDAQ: NXTD and NXTDW) ... the growing mobile commerce market, announces it has retained famous ... the 2015 International CES debut of the Wocket™ biometric smart ... at the NXT-ID booth January 6th and 7 th , ...
(Date:12/22/2014)... 2014 Holiday Season may be the brightest ever for ... the long anticipated floodgates for consumer biometrics may finally ... phones, tablets, and wearable mobile devices that incorporate biometrics ... with nearly 4.8 billion biometric devices by 2020.   ...
(Date:12/19/2014)... Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) has announced ... Perimeter Security Systems Market" report to their offering. ... American perimeter security market is estimated to grow at a ... market holds a larger share in this market, ...
Breaking Biology News(10 mins):NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3
... a detailed picture of how and when opsins evolved, ... including humans. The evolutionary origins of vision remain ... relationships among the earliest opsin-possessing animals. Dr Davide ... at NUI Maynooth performed a computational analysis to test ...
... scattering experiments have provided new insights into the origin ... all over the world. The analysis conducted by scientists ... Grenoble, and published in Scientific Reports , follows ... reduce these harmful complications. Wherever you are in ...
... in Toronto have established that a drug recently approved ... a rare form of cystic fibrosis works in an ... various forms of cystic fibrosis. Cystic fibrosis is ... world. Cystic fibrosis patients carry a defective gene that ...
Cached Biology News:Neutrons help explain why antibiotics prescribed for chemotherapy cause kidney failure 2Neutrons help explain why antibiotics prescribed for chemotherapy cause kidney failure 3Neutrons help explain why antibiotics prescribed for chemotherapy cause kidney failure 4Insights into a new therapy for a rare form of cystic fibrosis 2
... weight determinations for petroleum-based applications. Multiple solvents can be used, such as water, benzene, formamide, ... ... ... ...
rat Leptin...
SHEEP ANTI ESCHERICHIA COLI...
... culture chambered coverslips are convenient ... staining and imaging. The chambered ... with standard optical-quality coverslips and ... to use. Preassembled CultureWell systems ...
Biology Products: