Nanodiamond Particles in Electronic and Optical Applications
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1203-J08-01
Nanodiamond Particles in Electronic and Optical Applications O. Shenderova1, S. Ciftan Hens1, I.Vlasov2, V. Borjanovic1, G. McGuire1 International Technology Center, Raleigh, NC, 27617 (USA) 2 General Physics Institute, Russian Academy of Sciences, 119991 Moscow (Russia) 1
ABSTRACT Current use of nanodiamond (ND) particles in electronic-related applications is mostly restricted to their role in seeding of substrates for growth of diamond films by chemical vapor deposition (CVD). While it is a niche application, nanometer-sized diamond particles are indispensable in this role. Seeding of substrates using a novel slurry of detonation nanodiamond particles in dimethylsulfoxide (DMSO) and methanol is one of the topics of this article. At the same time, optical applications of NDs, particularly development of photoluminescent NDs for biomedical applications is one of the most popular current research topics. In this paper perspectives for the use of detonation NDs and specifically the role of surface functionalization in imparting photoluminescent properties to detonation NDs as well as enhanced photoluminescence of proton irradiated ND-polydimethylsiloxane composites are discussed. INTRODUCTION While the importance of high quality diamond films in optical applications and electrically conductive doped diamond films in electronics and bioelectronics is well recognized and they are in high demand, the role of nanodiamond (ND) particles in these applications is not so obvious. So far ND in the particulate form plays a secondary role in diamond-related electronics and this role is mostly based on its small size, such as, for example, in seeding of substrates for CVD diamond film growth [1]. Another application illustrating the use of ND in electronic application is related to electron field emission, where a coating of detonation NDs (DNDs) particles on Si or metal tips can improve cold cathode performance due to an overall decrease of the work function of the structure [2]. While the listed applications are rather narrow the range of applications in electronics can be very broad if electrically conductive nanodiamond particles can be synthesized. Production of conductive boron-doped nanodiamond particles can be very beneficial and can find broad applications in high surface area carbon electrodes for electroanalysis, electrochemical double-layer capacitors, storage materials for batteries, electrocatalyst support material for fuel cells, stationary support for liquid chromatography and other applications [3]. Growth of diamond films on a foreign substrate using a CVD process typically requires methods to enhance the nucleation of diamond, such as bias-enhanced nucleation or the scratching techniques. One of the popular method is seeding of the substrate with diamond particles through the use of a slurry of diamond particles dispersed in an appropriate solvent accompanied by ultrasonic agitation. Detonation ND particles, produced from carbon-containing explosives, have an average primary particle size of only
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