Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > A breakthrough toward industrial production of fluorescent nanodiamonds

Abstract:
Activité of Normal & Pathologic Biomolecules- SANPB », Inserm / UEVE U829 (Genopole Evry, France) in collaboration with the Material Centre of Mines-ParisTech (Evry, France), the NRG - UMR 5060 CNRS / UTBM (Technology University of Belfort-Montbéliard) and the Physic Institute of Stuttgart University (Germany) discovered a novel route to fabricate fluorescent nanoparticles from diamond microcrystals. Results are published in Nanotechnology June10 2009 issue.

A breakthrough toward industrial production of fluorescent nanodiamonds

Genopole Evry, France | Posted on June 4th, 2009

Fluorescence is a major tool in life and material sciences. In biology/medicine, the coupling of fluorescent dyes, to proteins or nucleic acids (RNA, DNA) allows one to investigate their fate and interactions in cultured cells or in the body. Similarly, fluorescence is used in material sciences to detect electromagnetic fields, for optic storage or tracking (notably to detect fake products). However, most of fluorescent dyes are made of molecules with a limited life time due to chemical reactivity.

In this context fluorescent diamond nanoparticles present a valuable alternative thanks to their outstanding photophysical properties. They are very bright and possess long-term non-bleaching, non-blinking fluorescence in the red/NIR region. Based on these unique properties, multiple applications are foreseen in physics, material science, biochemistry and biology. However, until recently, the production of such nanoparticles was limited to the laboratory.

A single route is nowadays taken to fabricate such fluorescent nanoparticles. It consists of irradiating substitutional nitrogen-containing diamond nanocrystals, produced by the diamond industry, with electron or ion beams to create vacancies in the crystal lattice. Isolated substitutional nitrogen atoms then trap a moving vacancy during annealing to form a fluorescent NV centre. Unfortunately, the efficiency and yield of this route are low due to amorphization and the loss of moving vacancies to the surface during irradiation and annealing.

A top-down processing of diamond microcrystals, which are less prone to amorphization and vacancy loss, would provide a more industrially scalable route. However, in this case two barriers have to be surmounted - the difficulties of irradiating large amounts of material and converting microdiamonds into nanocrystals while keeping both fluorescence properties and crystal structure intact.

In a recent study, which is published in Nanotechnology, researchers in France and Germany have explored with success this alternative route to producing homogeneous samples of pure and very small fluorescent diamond nanoparticles with high yield. The fabrication procedure starts with the irradiation of finely controlled micron-size diamonds and requires subsequent milling and purification steps. In this novel process, substitutional nitrogen-containing microdiamonds with defined atomic composition were irradiated using a high-energy electron beam and then annealed at high temperature (800 °C) to create the desired photoluminescent centres in an intact diamond lattice. An original two-step milling protocol was designed to convert the fluorescent microdiamond into very small (down to 4 nm) round-shape nanoparticles of highly pure sp3 diamond with very bright and stable photoluminescent centres.

Such a fine fabrication process can now be used for the large-scale production of fluorescent diamond nanoparticles. One can vary and tailor their properties via the composition of the starting material to answer the needs of future applications. These fluorescent diamond nanoparticles open realistic perspectives to very long term labeling, to quantitative biology and innovative nanotechnology applications in composites, optoelectronics or analytical chemistry.

Reference : « High yield fabrication of fluorescent nanodiamonds », Jean-Paul Boudou, Patrick A. Curmi, Fedor Jelezko, Joerg Wrachtrup, Pascal Aubert, Mohamed Sennour, Gopalakrischnan Balasubramanian, Rolf Reuter, Alain Thorel and Eric Gaffet, 2009, Nanotechnology 20 235602

(www.iop.org/EJ/abstract/0957-4484/20/23/235602/)

####

For more information, please click here

Contacts:
Patrick Curmi

33-144-236-086

Copyright © INSERM (Institut national de la santé et de la recherche méd

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

New synthesis method may shape future of nanostructures, clean energy: Findings advance efficient solar spliting of water into hydrogen fuel September 2nd, 2014

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Engineers develop new sensor to detect tiny individual nanoparticles September 2nd, 2014

Future solar panels September 2nd, 2014

Nano-forests to reveal secrets of cells September 2nd, 2014

Imaging

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Law enforcement/Anti-Counterfeiting/Security/Loss prevention

Nanotech Security Corp. to Acquire Fortress Optical Features Ltd., a Leading Producer of Banknote Security Features August 27th, 2014

Self-assembling nanoparticle could improve MRI scanning for cancer diagnosis: Scientists have designed a new self-assembling nanoparticle that targets tumours, to help doctors diagnose cancer earlier July 16th, 2014

Projecting a Three-Dimensional Future: TAU researchers develop holography technology that could change the way we view the world July 9th, 2014

Nanotechnology that will impact the Security & Defense sectors to be discussed at NanoSD2014 conference July 8th, 2014

Memory Technology

Promising Ferroelectric Materials Suffer From Unexpected Electric Polarizations: Brookhaven Lab scientists find surprising locked charge polarizations that impede performance in next-gen materials that could otherwise revolutionize data-driven devices August 18th, 2014

Can our computers continue to get smaller and more powerful? University of Michigan computer scientist reviews frontier technologies to determine fundamental limits of computer scaling August 13th, 2014

An Inkjet-Printed Field-Effect Transistor for Label-Free Biosensing August 11th, 2014

Rice's silicon oxide memories catch manufacturers' eye: Use of porous silicon oxide reduces forming voltage, improves manufacturability July 10th, 2014

Nanomedicine

UO-Berkeley Lab unveil new nano-sized synthetic scaffolding technique: Oil-and-water approach from Richmond's UO lab to spark new line of versatile peptoid nanosheets September 2nd, 2014

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Nano-forests to reveal secrets of cells September 2nd, 2014

Nanoscale assembly line August 29th, 2014

Discoveries

Secure Computing for the ‘Everyman': Quantum computing goes to market in tech transfer agreement with Allied Minds September 2nd, 2014

Cool Calculations for Cold Atoms: New theory of universal three-body encounters September 2nd, 2014

UO-Berkeley Lab unveil new nano-sized synthetic scaffolding technique: Oil-and-water approach from Richmond's UO lab to spark new line of versatile peptoid nanosheets September 2nd, 2014

Future solar panels September 2nd, 2014

Announcements

New synthesis method may shape future of nanostructures, clean energy: Findings advance efficient solar spliting of water into hydrogen fuel September 2nd, 2014

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Engineers develop new sensor to detect tiny individual nanoparticles September 2nd, 2014

Future solar panels September 2nd, 2014

Alliances/Partnerships/Distributorships

Leading European communications companies and research organizations have launched an EU project developing the future 5th Generation cellular mobile networks August 28th, 2014

JPK expands availability of instrumentation in the USA – appointing new distributors – launched a new web site to support the US market - AFM now available to US users August 26th, 2014

Sunblock poses potential hazard to sea life August 20th, 2014

SouthWest NanoTechnologies Appoints Matteson-Ridolfi for U.S. Distribution of its SMW™ Specialty Multiwall Carbon Nanotubes August 13th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE