Navigation Links
Cadmium selenide quantum dots degrade in soil, releasing their toxic guts, study finds
Date:7/18/2011

BUFFALO, N.Y. -- Quantum dots made from cadmium and selenium degrade in soil, unleashing toxic cadmium and selenium ions into their surroundings, a University at Buffalo study has found.

The research, accepted for publication in the journal Environmental Science and Technology, demonstrates the importance of learning more about how quantum dots -- and other nanomaterials -- interact with the environment after disposal, said Diana Aga, the chemistry professor who led the study.

Quantum dots are semiconductor nanocrystals with diameters of about 2 to 100 nanometers. Though quantum dots are not yet commonly used in consumer products, scientists are exploring the particles' applications in technologies ranging from solar panels to biomedical imaging.

"Quantum dots are not yet used widely, but they have a lot of potential and we can anticipate that the use of this nanomaterial will increase," said Aga, who presented the findings in late June at a National Science Foundation-funded workshop on nanomaterials in the environment. "We can also anticipate that their occurrence in the environment will also increase, and we need to be proactive and learn more about whether these materials will be a problem when they enter the environment."

"We can conclude from our research that there is potential for some negative impacts, since the quantum dots biodegrade. But there is also a possibility to modify the chemistry, the surface of the nanomaterials, to prevent degradation in the future," she said.

Aga's research into the afterlife of quantum dots is funded by a $400,000 Environmental Protection Agency grant to investigate the environmental transport, biodegradation and bioaccumulation of quantum dots and oxide nanoparticles.

Her collaborators on the new study in Environmental Science and Technology include PhD student Divina Navarro, Assistant Professor Sarbajit Banerjee and Associate Professor David Watson, all
'/>"/>

Contact: Charlotte Hsu
chsu22@buffalo.edu
716-645-4655
University at Buffalo
Source:Eurekalert  

0

GOOD

Page: 1 2 3

Related biology technology :

1. Penn research advances understanding of lead selenide nanowires
2. U.Va.s Pfister accomplishes breakthrough toward quantum computing
3. NIST mechanical micro-drum cooled to quantum ground state
4. UCL grows first telecommunications wavelength quantum dot laser on a silicon substrate
5. Innovative device for quantum simulations
6. U of T scientist leads international team in quantum physics first
7. U of Toronto to award quantum mechanics prize to renowned physicist Sandu Popescu
8. Pairing quantum dots with fullerenes for nanoscale photovoltaics
9. Diamonds shine in quantum networks
10. Reportlinker Adds Quantum Dots: Technologies and Global Markets
11. Etched quantum dots shape up as single photon emitters, NIST tests show
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Cadmium selenide quantum dots degrade in soil, releasing their toxic guts, study finds
(Date:5/23/2013)... 2013 PI’s new LPS-24 positioners ... 15 mm travel range with closed-loop sensor resolution ... make these new positioners the ideal choice for ... rated version is also available. , More ... can be found at: , http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=1000745&prw-lps24 ...
(Date:5/23/2013)... 23, 2013  Saddleback Memorial Medical Center in ... first hospital on the West Coast to perform a ... option provides women with a state-of-the-art, minimally invasive approach ... Winter , M.D., a highly regarded ... director of minimally invasive surgery at Saddleback Memorial, led ...
(Date:5/23/2013)... 2013 BioTrends Research Group, one of ... specialized biopharmaceutical issues, finds that, unaided, one in ... reported that in the past six months, they ... in anticipation of the next generation of HCV ... only 6 percent reported that they had begun ...
(Date:5/23/2013)... , May 23, 2013 Z Trim ... value-added ingredients to a variety of industries, announced that ... a panel discussion at this year,s National Restaurant Association ... 2013, on behalf of the Research Chefs Association.  Chef ... Restaurants: The Good, the Bad and the Ugly," joining ...
Breaking Biology Technology:Precision Positioning System Uses Miniaturezed Piezo Linear Motor: LPS-24 Linear Stage by PI 2Saddleback Memorial Surgeon First on the West Coast to Perform Single-Site Robotic Hysterectomy 2Saddleback Memorial Surgeon First on the West Coast to Perform Single-Site Robotic Hysterectomy 3The Majority of Physicians that Treat Hepatitis C Virus (HCV) Have Begun "Warehousing" and Preparing Their HCV Patients for the Next Generation of HCV Treatments 2The Majority of Physicians that Treat Hepatitis C Virus (HCV) Have Begun "Warehousing" and Preparing Their HCV Patients for the Next Generation of HCV Treatments 3Z Trim's Chef Erin Ryan sits on Expert Panel at NRA Show 2Z Trim's Chef Erin Ryan sits on Expert Panel at NRA Show 3
... Optimer Pharmaceuticals, Inc. (Nasdaq: OPTR ) ... developmental product candidate, fidaxomicin, will be presented ... Infectious Disease Society of America (IDSA) to be held ... Canada on October 21-24, 2010. (Logo: ...
... Iceland, October 11, 2010 ... ... var ... by longUrl, so we need to grab the first one. for (var r in data.results) { first_result ...
... 2010 VIB researchers at the University of Antwerp have identified ... of Hereditary Sensory and Autonomous Neuropathy Type 1 (HSAN 1). ... nervous system. Identification of the mutations will lead to a ... as improved genetic counseling and prenatal diagnostic tests for couples ...
Cached Biology Technology:Optimer Pharmaceuticals Announces Presentations at Upcoming IDSA Annual Meeting 2Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 2Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 3Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 4Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 5Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 6Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 7Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio 8HSAN 1: Identification of new mutations, more accurate diagnosis and improved genetic counseling 2
(Date:5/24/2013)... scientists have focused among other factors on drugs ... is the accumulation of A-beta that causes the known plaques ... formation of A-beta is APP. Alessia Soldano and Bassem Hassan ... APPL the fruit-fly version of APP in the ... Leuven): "We have discovered that APPL ensures that brain cells ...
(Date:5/24/2013)... scientists from around the world today issued a stark ... of one or two generations, the majority of the ... the handicap of severe pressure on fresh water, an ... substitute. This handicap will be self-inflicted and is, we ... chronic underlying problems led by mismanagement and sent a ...
(Date:5/23/2013)... Plant Science , Automated conserved ... and promoter evolution among grasses , Within the ... of DNA that undergo little change in position and ... for any proteins. Some of these evolutionarily stable sequences, ... the expression of other genes or the condensation of ...
Breaking Biology News(10 mins):A new strategy required in the search for Alzheimer's drugs? 2A majority on Earth face severe self-inflicted water woes within 2 generations: Scientists 2A majority on Earth face severe self-inflicted water woes within 2 generations: Scientists 3A majority on Earth face severe self-inflicted water woes within 2 generations: Scientists 4Frontiers news briefs: May 23 2Frontiers news briefs: May 23 3
... Calif., and PARIS, Nov. 15, 2011 ... of authentication and endpoint protection solutions, today announced ... software for biometric device manufacturers and solution providers. ... template generation along with fast one-to-many identification and ...
... environment and undermining many benefits we rely on from ... stability, according to a team of scientists writing in ... Issues in Ecology . In "Setting Limits: Using ... lead author Mark Fenn (USDA Forest Service) and nine ...
... A $7.5 million award will help researchers harness ... create new types of antidotes for exposure to pesticides ... Institutes of Health (NIH), extends a previous grant and ... University, where chemists will collaborate with the U.S. Army ...
Cached Biology News:DigitalPersona Announces FingerJet OEM Fingerprint Recognition Software for Biometric Device Manufacturers and Solution Providers 2DigitalPersona Announces FingerJet OEM Fingerprint Recognition Software for Biometric Device Manufacturers and Solution Providers 3Using air pollution thresholds to protect and restore ecosystem health 2Using air pollution thresholds to protect and restore ecosystem health 3Researchers get $7.5M grant to combat nerve agents 2Researchers get $7.5M grant to combat nerve agents 3
Sirtuin 7 (SIRT7) Rabbit anti-Human Polyclonal Antibody Immunogen: Synthetic peptide - KLH conjugated Family: Other Recommended Storage: Long term: -20C; Short term: +4C...
... The RSH-4000 is the only microplate sealer ... offers long walkaway times with a variety ... , Fully automated with integrated stacker and ... PlateCrane EX for use in small workcells ...
... of mouse embryonic stem cells to dopaminergic ... midbrain, where they are mainly located in ... and the retrorubral field. These dopaminergic (DA) ... innervation ( e.g.projections to the caudate nucleus, ...
... DNA aptamer screening and binding optimization and ... microfluidic on-chip synthesis platform. Thousands of customer ... LC Sciences can provide assistance with custom ... part of our comprehensive DNA/RNA Aptamer Microarray ...
Biology Products: