TY - JOUR
T1 - Microstructured Optical Waveguide-Based Endoscopic Probe Coated with Silica Submicron Particles
AU - Ermatov, Timur
AU - Petrov, Yuri
AU - German, Sergei V.
AU - Zanishevskaya, Anastasia
AU - Shuvalov, Andrey
AU - Atkin, Vsevolod
AU - Zakharevich, Andrey
AU - Khlebtsov, Boris
AU - Skibina, Julia
AU - Ginzburg, Pavel
AU - Noskov, Roman
AU - Tuchin, Valery
AU - Gorin, Dmitry A.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Microstructured optical waveguides (MOW) are of great interest for chemical and biological sensing. Due to the high overlap between a guiding light mode and an analyte filling of one or several fiber capillaries, such systems are able to provide strong sensitivity with respect to variations in the refractive index and the thickness of filling materials. Here, we introduce a novel type of functionalized MOWs whose capillaries are coated by a layer-by-layer (LBL) approach, enabling the alternate deposition of silica particles (SiO2) at different diameters—300 nm, 420 nm, and 900 nm—and layers of poly(diallyldimethylammonium chloride) (PDDA). We demonstrate up to three covering bilayers consisting of 300-nm silica particles. Modifications in the MOW transmission spectrum induced by coating are measured and analyzed. The proposed technique of MOW functionalization allows one to reach novel sensing capabilities, including an increase in the effective sensing area and the provision of a convenient scaffold for the attachment of long molecules such as proteins.
AB - Microstructured optical waveguides (MOW) are of great interest for chemical and biological sensing. Due to the high overlap between a guiding light mode and an analyte filling of one or several fiber capillaries, such systems are able to provide strong sensitivity with respect to variations in the refractive index and the thickness of filling materials. Here, we introduce a novel type of functionalized MOWs whose capillaries are coated by a layer-by-layer (LBL) approach, enabling the alternate deposition of silica particles (SiO2) at different diameters—300 nm, 420 nm, and 900 nm—and layers of poly(diallyldimethylammonium chloride) (PDDA). We demonstrate up to three covering bilayers consisting of 300-nm silica particles. Modifications in the MOW transmission spectrum induced by coating are measured and analyzed. The proposed technique of MOW functionalization allows one to reach novel sensing capabilities, including an increase in the effective sensing area and the provision of a convenient scaffold for the attachment of long molecules such as proteins.
UR - http://dx.doi.org/10.3390/ma12091424
U2 - 10.3390/ma12091424
DO - 10.3390/ma12091424
M3 - Article
SN - 1996-1944
VL - 12
JO - Materials
JF - Materials
M1 - 1424
ER -