Thermo- and pH-responsive fluorescence behaviors of sulfur-functionalized detonation nanodiamond-poly(N-isopropylacrylamide) Academic Article

abstract

• 2015, Springer-Verlag Berlin Heidelberg. Detonation nanodiamonds (DNDs) are emerging as bioimaging platforms due to their biocompability, small primary particle size, reactive surface, and stable fluorescence after modification. In this paper, a heteroatom engineering method is provided to fabricate the fluorescent DNDs through pyrolysis of dibenzyl disulfide. The quantum yield of these sulfur (S)-functionalized DNDs (SDNDs) increases with sulfur percentage. The solubility and stability of SDNDs in aqueous solution are also significantly increased due to the formation of hydrophilic sulfur groups on DND. Furthermore, these SDNDs are used to conjugate the stimuli-responsive poly(N-isopropylacrylamide) (PNIPAM) through the graft from method. The conjugation demonstrated both pH- and thermo-responsive fluorescence behaviors, which shows promise to be used in ratiometric fluorescence sensing for the detection of intracellular pH and temperature values.

authors

• Qiu, Jingjing
• Wang, Shiren

published proceedings

• COLLOID AND POLYMER SCIENCE

author list (cited authors)

• Su, S., Wei, J., Zhang, K., Qiu, J., & Wang, S.

citation count

• 23

complete list of authors

• Su, Siheng||Wei, Junhua||Zhang, Kun||Qiu, Jingjing||Wang, Shiren

publication date

• April 2015

publisher

• Springer Nature  Publisher

published in

• Colloid and Polymer Science: Kolloid-Zeitschrift und Zeitschrift fuer Polymere  Journal

keywords

• Nanodiamond
• Ph-responsive
• Poly(N-isopropylacrylamide)
• Thermo-responsive

Digital Object Identifier (DOI)

• 10.1007/s00396-015-3531-x

start page

• 1299

end page

• 1305

volume

• 293

issue

• 4

URL

• http://dx.doi.org/10.1007/s00396-015-3531-x