title: Photosensitive functionalized surface-modified quantum dots for polymeric structures via two-photon-initiated polymerization technique.
abstract: In this paper, the surface modification of CdSe- and CdZnS-based quantum dots (QDs) with a functional silica shell is reported. Functionalized silica shells are prepared by two routes: either by ligand exchange and a modified Stöber process or by a miniemulsion process with amphiphilic poly(oxyethylene) nonylphenylether also know as Igepal CO-520 (IG) as oligomeric amphiphile and modified silica precursors. The polymerizable groups on the functionalized silica shell allow covalent bonding to a polymer matrix and prevent demixing during polymerization and crosslinking. This allows the homogeneous incorporation of QDs in a crosslinked polymer matrix. This paper furthermore demonstrates that the resulting QDs, which are i) shielded with a proper silica shell and ii) functionalized with crosslinkable groups, can be used in two-photon-initiated polymerization processes in combination with different photoresists to obtain highly luminescent 3D structures. The resulting luminescent structures are attractive candidates for photonics and metamaterials research.
authors: Department of Organic Chemistry, Johannes Gutenberg University, Mainz, Duesbergweg 10-14, 55099, Mainz, Germany.
authors: Redouane
authors: R
authors: Krini
authors: Department of Advanced Materials, Korean Advanced Institute of Science and Technology (KAIST), Daejeon, 305-811, Korea.
authors: Cheol Woo
authors: CW
authors: Ha
authors: Department of Advanced Materials, Hannam University, 461-6 Jeonmin-dong, Yuseong-gu, Daejeon, 305-811, Korea.
authors: Prem
authors: P
authors: Prabhakaran
authors: Department of Organic Chemistry, Johannes Gutenberg University, Mainz, Duesbergweg 10-14, 55099, Mainz, Germany.
authors: Hicham El
authors: HE
authors: Mard
authors: Department of Advanced Materials, Korean Advanced Institute of Science and Technology (KAIST), Daejeon, 305-811, Korea.
authors: Dong-Yol
authors: DY
authors: Yang
authors: Department of Organic Chemistry, Johannes Gutenberg University, Mainz, Duesbergweg 10-14, 55099, Mainz, Germany.
authors: Rudolf
authors: R
authors: Zentel
authors: Department of Advanced Materials, Hannam University, 461-6 Jeonmin-dong, Yuseong-gu, Daejeon, 305-811, Korea.
authors: Kwang-Sup
authors: KS
authors: Lee
mesh_terms: D017785:Photons; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D045663:Quantum Dots / Q000737:chemistry* / Q000648:ultrastructure; D012822:Silicon Dioxide / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties
chemical_list: D011108:Polymers; D012822:Silicon Dioxide
keywords: 3D patterned network structures; quantum dots; silica encapsulating; two-photon-initiated polymerization