Navigation Links
Novel NIST process is a low-cost route to ultrathin platinum films

A research group at the National Institute of Standards and Technology (NIST) has developed a relatively simple, fast and effective method of depositing uniform, ultrathin layers of platinum atoms on a surface.* The new process exploits an unexpected feature of electrodeposition of platinumif you drive the reaction much more strongly than usual, a new reaction steps in to shuts down the metal deposition process, allowing an unprecedented level of control of the film thickness.

Platinum is a widely used industrial catalystin automobile catalytic converters and hydrogen fuel cellsas well as a key component in microelectronics, so the discovery may have widespread application in the design and manufacture of platinum-based devices.

The metal is rare, and hence very pricey, so materials engineers try to use it sparingly as a thin layer on a substrate. They'd like to be able to control the deposition process down to uniform, single layers of atoms. Unfortunately, platinum doesn't always cooperate.

The model system studied at NISTdepositing a platinum layer on gold by electroplatingdemonstrates the challenging nature of the problem. A voltage is applied to drive the deposition of platinum from an electrode onto the gold surface in an aqueous solution. Normally, this leads to a patchy and rough surface rather than the desired smooth and even layer of platinum, because platinum tends to attach first to any defects on the gold surface, and then tends to attach to itself, rather than the gold.

The NIST team has found that increasing the voltage, the driving force of the reaction, far higher than normal to the point where the water molecules start to break down and hydrogen ions form, leads to an unexpected and useful result. The hydrogen quickly forms a layer covering the freshly deposited platinum islands and completely quenches further metal deposition. Using a battery of analytic techniques, including a quartz crystal microbalance, X-ray photoelectron spectroscopy and scanning tunneling microscopy, the group found that the formation of the hydrogen layer was rapid enough to restrict deposition to the formation of a single layer of platinum atoms. The team further discovered that by pulsing the applied voltage, they could selectively remove the hydrogen layer to enable the platinum deposition process to be repeated to form another layer.

The deposition process occurs in a single plating bath and is surprisingly fast1,000 times faster than making comparable films using molecular beam epitaxy, for example. It's also faster, simpler and less prone to contamination than other electrochemical techniques for depositing platinum films, making it much less expensive.


Contact: Michael Baum
National Institute of Standards and Technology (NIST)

Related biology technology :

1. Phase II Data Presented at ACNP 2012 Shows Novel Antidepressant GLYX-13 Significantly Reduces Depression Scores Within Hours
2. Kitware Develops Novel System for Autonomous Robot Navigation
3. Cartilage made easy with novel hybrid printer
4. Novel Cancer Immune Therapy Developer Oncos Therapeutics Appoints Experienced Industry Leader Frans Wuite as President and CEO
5. NIH Awards New England Biolabs a Phase II SBIR Grant for the Research and Development of Novel Enzymes for Epigenetic Studies
6. ViThera Novel Approach Using Probiotics to Deliver Elafin Shows Promise as a Future Inflammatory Bowel Disease (IBD) Treatment
7. Merrimack Pharmaceuticals To Present Preliminary Clinical Data For Novel Therapies Targeting Molecular Pathways In Advanced Cancers
8. AFCell Medical Reports Results from the Retrospective Study of a Novel Allograft Membrane to Prevent Post-Operative Adhesions in the Repair of Peroneal and Posterior Tibial Tendons
9. ESTEVE Announces the Publication of Comprehensive Phase I Data for a Novel Oral, First-in-class New Chemical Entity (NCE),E-52862, a Sigma-1 Receptor Antagonist (S1RA) Being Developed for Pain
10. ARMGO Pharma, Inc. announces data which supports its Rycal program as a novel approach for the treatment of stress-induced cognitive disorders
11. Novel technique to synthesize nanocrystals that harvest solar energy
Post Your Comments:
Related Image:
Novel NIST process is a low-cost route to ultrathin platinum films
(Date:11/25/2015)... ... November 25, 2015 , ... Jessica Richman and ... early in their initial angel funding process. Now, they are paying it forward ... make early stage investments in the microbiome space. In this, they join ...
(Date:11/24/2015)... 2015 Cepheid (NASDAQ: CPHD ) today ... following conference, and invited investors to participate via webcast. ...      Tuesday, December 1, 2015 at 11.00 a.m. Eastern Time ...      Tuesday, December 1, 2015 at 11.00 a.m. Eastern Time ... New York, NY      Tuesday, December 1, 2015 ...
(Date:11/24/2015)... Mass. (PRWEB) , ... November 24, 2015 , ... ... to maintain healthy metabolism. But unless it is bound to proteins, copper is ... of Health (NIH), researchers at Worcester Polytechnic Institute (WPI) will conduct a systematic ...
(Date:11/24/2015)... 2015  Clintrax Global, Inc., a worldwide provider of clinical research ... announced that the company has set a new quarterly earnings record ... quarter growth posted for Q3 of 2014 to Q3 of 2015. ... Mexico , with the establishment of an Asia-Pacific ... United Kingdom and Mexico ...
Breaking Biology Technology:
(Date:10/27/2015)... JOSE, Calif. , Oct. 27, 2015 Synaptics ... interface solutions, today announced that Google has adopted the ... of touch controller solutions to power its newest flagship ... 6P by Huawei. --> ... partners like Google to provide strategic collaboration in the ...
(Date:10/26/2015)...  Delta ID Inc., a company focused on bringing ... devices, announced its ActiveIRIS® technology powers the iris recognition ... by NTT DOCOMO, INC in Japan ... to include iris recognition technology, after a very successful ... May 2015, world,s first smartphone to have this capability. ...
(Date:10/22/2015)... Inc. (NASDAQ: AWRE ), a leading supplier of biometrics software ... September 30, 2015.  --> --> ... a decrease of 33% compared to $6.0 million in the same ... was $2.2 million, or $0.10 per diluted share, which compared to ... a year ago.  --> --> ...
Breaking Biology News(10 mins):