The Department of Materials Science and Engineering invites you to join us for an upcoming Fall Seminar:
FULL SEMINAR SCHEDULE AT: http://www.virginia.edu/ms/seminarschedule083.html

Olga Shenderova

International Technology Center

Raleigh, NC 27617

Host: Leonid Zhigilei

Detonation Nanodiamond and Onion-like

Carbon: Properties & Applications

Date: October 20, 2008

Time: 4:00pm – 5:00pm

Refreshments: 3:30 to 4:00

Room: Wilsdorf Hall 101

ABSTRACT:

Within the last 3-4 years world-wide interest in the area of nanodiamond particles has grown

rapidly1. Nanodiamond particles with the smallest monocrystalline size (about 4nm), so called

detonation nanodiamonds (DND), are produced by detonation of carbon-containing explosives.

Numerous applications of DND are under development including high precision polishing;

addition to metal coatings resulting in improved wear resistance; anti-friction additives to

lubricants and oils; nanofluids for enhanced heat transfer (transformer oils, cooling in

microelectronics); polymer nanocomposites and coatings with enhanced strength, impact

resistance, scratch resistance, thermal degradation and thermal conductivity; UV-protection

coatings, sunscreens; slurries for seeding for growth of CVD diamond films and many others

areas. Also, DNDs serve as a source material for the production of onion-like carbon (OLC) by

high temperature annealing of DND in a non-reactive (inert) atmosphere. Recently it was

demonstrated that OLCs are strong absorbers of electromagnetic (EM) radiation from gigahertz to

terahertz to visible spectral ranges, providing efficient EMI shielding. Several examples of

applications under development at ITC and its collaborators using the modified/fractionalized

DND will be discussed with major emphasis on applications of DND and OLC in composites and

in biotechnology. For example, it was demonstrated that nanodiamond particles embedded to a

polydimethilsiloxane matrix attain very pronounced photoluminescent properties when irradiated

with a flux of MeV protons. This suggests an application of the ND-polymer coatings as

fluorescence-induced indicators of a proton dose acquired, for example, by a spacecraft vehicle.

We will report on the fabrication of novel composites of carbon nanotubes incorporated into a

nanodiamond matrix producing mixtures from nanocarbons that are complementary in chemical

and mechanical strength and are expected to produce unique physical properties. Photonic

structures made of DND as well as other applications will be also discussed.

1. Ultrananocrystalline Diamond: Synthesis, Properties and Applications of (eds O.A.

Shenderova, D.M.Gruen (William Andrew Publishing, Norwich, NY, 2006).

Acknowledgment.

I wish to acknowledge my colleagues and collaborators who contributed to the reported studies: Suzanne

Hens, Garry Cunningham, Varvara Grichko, Talmage Tyler, Vesna Borjanovic, and Gary McGuire of ITC,

Igor Petrov of New Technologies, Russia, Vladimir Kuznetsov of Boreskov Institute of Catalysis, Russia,

Sergey Maksimenko and Polina Kuzhir of Institute for Nuclear Problem of Belarus State University,

Belarus.