Share Email Print
cover

Proceedings Paper

Quantum dots light emitting devices on MEMS: microcontact printing, near-field imaging, and early cancer detection
Author(s): Ashwini Gopal; Kazunori Hoshino; John X. J. Zhang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Controlled patterning of light emitting devices on semiconductors and micro-electro-mechanical systems (MEMS) enables a vast variety of applications such as structured illumination, large-area flexible displays, integrated optoelectronic systems and micro-total analysis systems for real-time biomedical screening. We have demonstrated a series of techniques of creating quantum dot-based (QD) patterned inorganic light emitting devices at room temperature on silicon (Si) substrate. The innovative technology was translated to create localized QD-based light sources for two applications: (1) Three-dimensional scanning probe tip structures for near field imaging. Combined topographic and optical images were acquired using this new class of "self-illuminating" probe in commercial NSOM. The emission wavelength can be tuned through quantum-size effect of QDs. (2) Multispectral excitation sources integrated with microfluidic channels for tumor cell analyses. We were able to detect the variation of sub-cellular features, such as the nucleus-to-cytoplasm ratio, to quantify the absorption at different wavelength upon the near-field illumination of individual tumor cells towards the determination of cancer developmental stage.

Paper Details

Date Published: 8 September 2011
PDF: 10 pages
Proc. SPIE 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, 819106 (8 September 2011); doi: 10.1117/12.901089
Show Author Affiliations
Ashwini Gopal, The Univ. of Texas at Austin (United States)
Kazunori Hoshino, The Univ. of Texas at Austin (United States)
John X. J. Zhang, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 8191:
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies
Yuelin Wang; Huikai Xie; Yufeng Jin, Editor(s)

© SPIE. Terms of Use
Back to Top