Title :
Study of electric field caused by semiconductor quantum dots in close proximity to DNA origami
Author :
Ke Xu ; Meshik, Xenia ; Min Choi ; Dutta, Maitreyee ; Stroscio, Michael ; Tsai-Chin Wu ; Rahman, Mosaddequr ; Norton, Mark
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Illinois at Chicago, Chicago, IL, USA
Abstract :
Fluorescent semiconductor quantum dots (QDs) are frequently used in conjunction with biological molecules in a wide variety of applications. A negative 30-nm shift in QD emission has been observed upon binding CdSe QDs to DNA origami, a large scaffolded double-stranded DNA molecule. This paper effectively explains the observed emission shift by modeling the effect of the electric field generated by the DNA origami on the band structure of the QD. A relationship between photon energy shift and QD-origami distance is also presented.
Keywords :
DNA; II-VI semiconductors; band structure; cadmium compounds; electric field effects; fluorescence; molecular biophysics; semiconductor quantum dots; wide band gap semiconductors; CdSe; CdSe quantum dots; DNA origami; QD emission; QD origami distance; band structure; binding; biological molecules; close proximity; double-stranded DNA molecule; electric field effect; emission shift; fluorescent semiconductor quantum dots; photon energy shift; DNA; Electric fields; Nanobioscience; Photonics; Quantum dots; Quantum mechanics; DNA origami; band bending; photoluminescence; quantum dots;
Conference_Titel :
Computational Electronics (IWCE), 2014 International Workshop on
Conference_Location :
Paris
DOI :
10.1109/IWCE.2014.6865880
