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Facile Fabrication of Gelatin-Based Biopolymeric Optical Waveguides
被引:49
作者:
Manocchi, Amy K.
[1
]
Domachuk, Peter
[2
]
Omenetto, Fiorenzo G.
[2
,3
]
Yi, Hyunmin
[1
]
机构:
[1] Tufts Univ, Dept Biol & Chem Engn, Medford, MA 02155 USA
[2] Tufts Univ, Dept Biomed Engn, Medford, MA 02155 USA
[3] Tufts Univ, Dept Phys, Medford, MA 02155 USA
关键词:
biopolymers;
gelatin;
optical waveguide;
CROSS-LINKED GELATIN;
SILK FIBROIN;
CELL-CULTURE;
FILMS;
BIOSENSORS;
DEVICES;
IMMOBILIZATION;
BIOMATERIALS;
ELEMENTS;
LINKING;
D O I:
10.1002/bit.22306
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
The rapid development in optical detection techniques for sensing applications has led to in increased need for biocompatible, biodegradable, and disposable optical components. We present a controllable fabrication technique for an entirely biopolymeric planar optical waveguide via simple spin-coating. The refractive index difference, thermal responsive properties, and inherent biocompatibility of gelatin and agarose were exploited in the fabrication of thin, stacked films that efficiently guide light in a core layer with higher index of refraction. These planar waveguides were fabricated using a simple spin-coating technique, which resulted in controllable layer thicknesses and smooth layer interfaces. This technique, therefore, offers a path for routine engineering of biopolymer structures with contrasting refractive indices. The thermal stability of the gelatin core layer was improved using two crosslinkers; glutaraldehyde or microbial Transglutaminase. Light guiding in the core layer of the waveguide was demonstrated using a simple He-Ne laser setup. Guiding efficiency was further illustrated by directly embedding fluorescent markers within the core layer and detecting their spectral signature. Combined with the biopolymers inherent biocompatibility and biodegradability, our simple strategy to fabricate disposable optical components holds the potential for the development of applications in biological sensing and implantable biomedical devices. Biotechnol. Bioeng. 2009;103: 725-732. (c) 2009 Wiley Periodicals, Inc.
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页码:725 / 732
页数:8
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