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Gold Nanotechnology

interest in Preparation and characterization of gold catalysts.

Members: 12
Latest Activity: Apr 18, 2013

Gold nanopartIcles

Gold nanopartIcles
Due to its largely nonreactive nature gold has long been considered a “noble” metal, undergoing few of the reactions of its transition metal counterparts. This assumption of considering gold catalytically inert changed, however, in the late 90s after the seminal contribution of Haruta, who reported that gold nanoparticles are extremely active in promoting the low - temperature, aerobic oxidation of CO to CO2 (Fig 1) [1] . Moreover, Haruta and co-workers showed that the catalytic activity of gold appears for particles in the nanometric size range, there being a direct relationship between activity and particle diameter [2]. Since this breakthrough, research has been aimed at determining the reaction types that can be efficiently catalyzed by nanometric gold particles, increasing the catalytic activity of gold by stabilizing nanoparticles against agglomeration, understanding the role of the solid support in the catalytic activity and also demonstrating the similarities and distinctive properties of gold catalysis with respect to catalysis by other noble metals.

Fig 1: Schematic illustration of one of the coadsorption and catalytic combustion cycles.

The importance of gold nanoparticles in catalysis derives in part from the wealth of information and reliable experimental procedures to form these nanoparticles in different sizes and, even different shapes [3].

1- Haruta, M., T. Kobayashi, et al. (1987). "Novel Gold Catalysts for the Oxidation of Carbon Monoxide at a Temperature far Below 0 °C " Chemistry Letters 16: 405-40

2- Haruta, M. (1997). "Size- and support-dependency in the catalysis of gold " Catalysis Today ( 36 ): 153-166.

3- Astruc, M.-C. D. a. D. ( 2004). "Gold Nanoparticles: Assembly, Supramolecular Chemistry, Quantum-Size-Related Properties, and Applications toward Biology, Catalysis, and Nanotechnology." Chem. Rev. 293-346 104: 293-346

Discussion Forum

synthesis of gold nanoparticles by nano pulsed laser ablation in water

Started by SOORAJ S Feb 13, 2012. 0 Replies

I am working on my course project titled " Laser induced assembly of gold nano particles into colloidal crystals". We are synthesising gold nano particles by nanopulsed laser(Nd-YAG second harmonic)…Continue

preparation of gold nanoparticlec

Started by Hatem M Altass. Last reply by Hatem M Altass Jun 4, 2010. 2 Replies

preparation of gold nanoparticlec    There are basically two different procedures to form gold nanoparticles, depending on whether they are going to be dispersed in a liquid or supported on a…Continue

Gold Nanoparticles and Cancer Cell Detection

Started by Hatem M Altass Jun 4, 2010. 0 Replies

Cancer is a difficult disease to treat, contain, and identify. There are many different ways for treating cancer such as surgery, chemotherapy, radiation and many others. These methods are effective…Continue

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Comment by Anand Kumar on September 3, 2010 at 10:00pm
will call u tomorrow sometime....

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Comment by Anand Kumar on September 3, 2010 at 9:56pm
How much do you need? equivalent to how many grams of gold?
send me your requirement on my email id - nano [at] autofibrecraft.com along with your contact details [ replace [at] by @ ]

Full member
Comment by Anand Kumar on September 3, 2010 at 9:49pm
u can start with chloroauric acid and then reduce...
if you need raw material, chloroauric acid let me know.

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Comment by Anand Kumar on September 3, 2010 at 9:42pm
inorganic route

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Comment by Dr. Anal K. Jha on September 3, 2010 at 9:37pm
Can anybody suggest a high yielding procedure for preparing pure (99.0%) gold nanoparticles.

Full member
Comment by Dr. Anal K. Jha on September 1, 2010 at 8:48pm
We are preparing it(Au) via green route.
 
 
 

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Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at editor@nanopaprika.eu

Dr. András Paszternák, founder of Nanopaprika

Publications by A. Paszternák:

The potential use of cellophane test strips for the quick determination of food colours

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

Polymeric Honeycombs Decorated by Nickel Nanoparticles

Directed Deposition of Nickel Nanoparticles Using Self-Assembled Organic Template,

Organometallic deposition of ultrasmooth nanoscale Ni film,

Zigzag-shaped nickel nanowires via organometallic template-free route

Surface analytical characterization of passive iron surface modified by alkyl-phosphonic acid layers

Atomic Force Microscopy Studies of Alkyl-Phosphonate SAMs on Mica

Amorphous iron formation due to low energy heavy ion implantation in evaporated 57Fe thin films

Surface modification of passive iron by alkylphosphonic acid layers

Formation and structure of alkylphosphonic acid layers on passive iron

Structure of the nonionic surfactant triethoxy monooctylether C8E3 adsorbed at the free water surface, as seen from surface tension measurements and Monte Carlo simulations