Navigation Links
Gold nanoparticles improve photodetector performance
Date:7/27/2013

WASHINGTON D.C. -- The mineral molybdenum disulfide (MoS2), which, when solid, behaves in many ways like grease, has semiconducting properties that make it a promising alternative to silicon or graphene in electronic devices. It also strongly absorbs visible light, and so it has been widely employed in light-sensing photodetectors, which are used in a wide range of technologies, such as environmental sensing, process control in factories, and optical communication devices.

Researchers at the National University of Singapore have now found a way to boost the performance of MoS2 photodetectors even further -- with nanoparticles of gold. They describe this improvement in the journal Applied Physics Letters, which is produced by AIP Publishing.

Wei Chen, an assistant professor of chemistry and physics, along with graduate student Jia Dan Lin, and their colleagues, applied a single, loosely arranged layer of gold nanoparticles to the top of a MoS2 photodetector. The gold layer, although less than 15 billionths of a meter thick (representing the diameter of each individual nanoparticle) and made up of fewer than 1000 individual particles, improved the photodetectors' efficiency by a factor of three, according to Chen.

"We anticipate orders of magnitude higher improvement of MoS2's sensitivity using a higher density of coated nanoparticles," Chen said.

Chen suspects that the plasmon oscillations (variations in the electron density) of individual nanoparticles -- which enhance the local optical field -- may be one reason for the improved performance of the photodetectors.

"The next step will focus on varying the materials used to make the nanoparticles, as well as their size, shape, and arrangement," Chen noted -- adjustments that will "tune" the plasmon resonance wavelength of the metal nanostructure arrays, making it possible for MoS2 photodetectors todetect multiple colors for the first time.


'/>"/>

Contact: Jason Socrates Bardi
jbardi@aip.org
240-535-4954
American Institute of Physics
Source:Eurekalert

Page: 1

Related biology technology :

1. Penn researchers develop protein passport that help nanoparticles get past immune system
2. Widely used nanoparticles enter soybean plants from farm soil
3. Nanoparticles digging the worlds smallest tunnels
4. Lung mucus gel scaffold prevents nanoparticles from getting through
5. New imaging technique homes in on electrocatalysis of nanoparticles
6. New structural information on functionalization of gold nanoparticles
7. Gold nanoparticles could treat prostate cancer with fewer side effects than chemotherapy
8. Study improves understanding of surface molecules in controlling size of gold nanoparticles
9. Nanoparticles found in moon glass bubbles explain weird lunar soil behavior
10. Nanoparticles seen as artificial atoms
11. Light touch keeps a grip on delicate nanoparticles
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... The first part of the session on ... Human Studies” will cover comprehensive clinical support in early ... increasing R&D costs and declining industry success in getting ... knowledge collected in early Phase I/IIa study data to ... stage development. , Next, the presenters will examine steps ...
(Date:7/24/2014)... , July 24, 2014   Cypher ... today the appointment of Adam Simpson ... Genomics provides rapid and comprehensive annotation and interpretation ... clinical reporting. "Cypher,s technology has the ... healthcare by enhancing diagnostic accuracy, optimizing therapeutic approaches ...
(Date:7/23/2014)... NEW YORK , July 24, 2014 /PRNewswire/ ... and Immune Pharmaceuticals Inc. (OTCQX and NASDAQ OMX ... "IMNP."; "Immune" or "the Company"), announced a collaboration ... bullous pemphigoid last night at an event attended ... other interested parties. Lyfebulb is a health and ...
(Date:7/23/2014)... great strides in saving China,s endangered national treasure, the ... giant panda reserves that have been established and three ... pandas remain in the wild. , Breeding programs ... panda by improving genetic diversity, avoid inbreeding and ultimately, ... these high-profile programs doing so far? , In a ...
Breaking Biology Technology:Best Practices for Optimizing Dose Escalation in First in Human Studies, New Webinar August 6th Hosted by Xtalks 2Cypher Genomics Announces the Appointment of Adam Simpson as President and COO to Advance Transformative Genome Interpretation Technology 2Cypher Genomics Announces the Appointment of Adam Simpson as President and COO to Advance Transformative Genome Interpretation Technology 3Innovative Collaboration To Increase Awareness Of Bullous Pemphigoid, A Rare Autoimmune Disease Of The Skin 2Innovative Collaboration To Increase Awareness Of Bullous Pemphigoid, A Rare Autoimmune Disease Of The Skin 3Innovative Collaboration To Increase Awareness Of Bullous Pemphigoid, A Rare Autoimmune Disease Of The Skin 4Innovative Collaboration To Increase Awareness Of Bullous Pemphigoid, A Rare Autoimmune Disease Of The Skin 5
... Fund More Than Doubles Assets Under Management, UTRECHT, ... growing European venture capital firm, today announced,the closing of ... Gilde,Healthcare II (GHC II). The new fund, which is ... funds raised to invest in European,healthcare opportunities. GHC II ...
... Emerging Nanotechnologies will host the U.S. launch of ... Responsible Nanotechnology aimed principally at businesses and research ... Society and the United Kingdom government-sponsored Nanotechnology Knowledge ... Association, Insight Investment. , The event ...
... Genmab Antibody,Summary: Genmab,s Partner Roche has Filed a CTA With the ... ... COPENHAGEN, October 2 Genmab A/S (OMX: GEN),announced today that ... British Medicines and Healthcare products,Regulatory Agency (MHRA) for a Genmab antibody ...
Cached Biology Technology:Gilde Healthcare Partners Closes EUR 150 Million European Healthcare Venture Fund 2A new 'responsible nanocode' for business 2Genmab A/S - Company Announcement 2
(Date:7/23/2014)... risk warning for Yellowknife and surrounding area because of ... In the image taken by the Aqua satellite, ... Fire is an obvious health hazard, but the ... obvious and its effects are insidious. , The smoke ... structure, tires, waste or wood burning) is a mixture ...
(Date:7/23/2014)... entire country in its grip is affecting more than the ... the proliferation of a heat-loving amoeba commonly found in warm ... the drought has made warmer than usual this year. , ... by this parasite after swimming in several area lakes. The ... and travels to the brain. Nose plugs can lower the ...
(Date:7/23/2014)... This news release is available in German . ... shape and stability to cells, drive metabolic processes and ... into complex three-dimensional shapes. Scientists at the Max Planck ... that proteins can be constructed of similar amino acid ... suggests that the proteins that exist today arose from ...
Breaking Biology News(10 mins):Diseases of another kind 2Protein evolution follows a modular principle 2
... has destroyed 17 percent of the native vegetation in ... new study published by Conservation International sounds an alarm ... Continued deforestation at the current rate would cause all ... years, according to CI researchers in Brazil. , Overall, ...
... It's one of those unavoidable facts of life -- ... internal temperatures cause only temporary discomfort, but in some ... , These convulsions are "scary and very upsetting to ... chair of Neurology. They've also been something of an ...
... shows that robot assisted knee surgery is significantly ... of surgeons tested whether Acrobot, a robotic assistant, ... knee replacement. Acrobot works by helping the surgeon ... the existing bones. , The surgeons looked at ...
Cached Biology News:Report shows deforestation threatens Brazil's Pantanal 2Molecular mechanism may explain how fevers spark seizures 2Molecular mechanism may explain how fevers spark seizures 3Robot assisted surgery more accurate than conventional surgery 2
Spectrolyse (pL) PAI kit is a two-stage indirect enzymatic assay for the quantitative determination of Plasminogen Activator Inhibitor (PAI-1) activity in plasma. Sample Type: plasma...
NAK/TBK1 (CT) Affinity Purified Polyclonal Antibody...
... human cardiac troponin subunit T, a 31kDa protein ... contraction of cardiac muscle. It reacts with subunit ... It also cross-reacts with human skeletal troponin T ... Highly purified human cardiac troponin T ...
... is pleased to offer the ATTO-TAG ... detection of primary amines. Developed by ... the ATTO-TAG reagents are similar to ... (NDA) and anthracene-2,3-dicarboxaldehyde, all of which ...
Biology Products: