title: Enhanced performance from a hybrid quenchometric deoxyribonucleic acid (DNA) silica xerogel gaseous oxygen sensing platform.
abstract: A complex of salmon milt deoxyribonucleic acid (DNA) and the cationic surfactant cetyltrimethylammonium (CTMA) forms an organic-soluble biomaterial that can be readily incorporated within an organically modified silane-based xerogel. The photoluminescence (PL) intensity and excited-state luminescence lifetime of tris(4,7'-diphenyl-1,10'-phenanathroline) ruthenium(II) [(Ru(dpp)3](2+), a common O2 responsive luminophore, increases in the presence of DNA-CTMA within the xerogel. The increase in the [Ru(dpp)3](2+)excited-state lifetime in the presence of DNA-CTMA arises from DNA intercalation that attenuates one or more non-radiative processes, leading to an increase in the [Ru(dpp)3](2+) excited-state lifetime. Prospects for the use of these materials in an oxygen sensor are demonstrated.
authors.affiliation: KLA-Tencor Corporation, 1 Technology Dr., Milpitas, CA 95035 USA.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.forename: Ke
authors.initials: K
authors.lastname: Liu
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.forename: Ka Yi
authors.initials: KY
authors.lastname: Yung
authors.forename: Carrie M
authors.initials: CM
authors.lastname: Bartsch
authors.forename: Emily M
authors.initials: EM
authors.lastname: Heckman
authors.forename: Frank V
authors.initials: FV
authors.lastname: Bright
authors.forename: Mark T
authors.initials: MT
authors.lastname: Swihart
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Cartwright
mesh_terms: D000818:Animals; D002593:Cetrimonium Compounds / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements; D010100:Oxygen / Q000032:analysis; D012474:Salmon; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D002593:Cetrimonium Compounds; D049408:Luminescent Agents; D012822:Silicon Dioxide; D004247:DNA; D010100:Oxygen