title: Deagglomeration and surface modification of thermally annealed nanoscale diamond.
abstract: Thermally annealed nanodiamond has been functionalized by C-C coupling of the partially graphitized diamond surface using aryl diazonium salts. Depending on the terminal functional groups, the modified bucky diamond nanoparticles show good solubility (up to 0.63mgmL(-1)) in different solvents. The agglomerate size of the originally strongly bound detonation diamond (>0.5μm) is substantially reduced to ∼20-50nm by this chemical procedure and without using mechanical techniques such as strong ultrasound or milling. Arylation with functionalized aryl diazonium salts carrying COOH, SO(3)H, NO(2) or bromoethyl groups opens the way for further covalent grafting of organic structures. Arylation with Ar-COOH or Ar-SO(3)H leads to the formation of stable colloidal solutions in water and physiological media (i.e. PBS buffer), an important prerequisite for biomedical applications.
authors.affiliation: Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
authors.forename: Yuejiang
authors.initials: Y
authors.lastname: Liang
authors.forename: Thomas
authors.initials: T
authors.lastname: Meinhardt
authors.forename: Gerald
authors.initials: G
authors.lastname: Jarre
authors.forename: Masaki
authors.initials: M
authors.lastname: Ozawa
authors.forename: Pavo
authors.initials: P
authors.lastname: Vrdoljak
authors.forename: Achim
authors.initials: A
authors.lastname: Schöll
authors.forename: Friedrich
authors.initials: F
authors.lastname: Reinert
authors.forename: Anke
authors.initials: A
authors.lastname: Krueger