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572 results on '"Sonkusale, Sameer"'

157. A Textile Dressing for Temporal and Dosage Controlled Drug Delivery

Author

Mostafalu, Pooria, primary, Kiaee, Gita, additional, Giatsidis, Giorgio, additional, Khalilpour, Akbar, additional, Nabavinia, Mahboobeh, additional, Dokmeci, Mehmet R., additional, Sonkusale, Sameer, additional, Orgill, Dennis P., additional, Tamayol, Ali, additional, and Khademhosseini, Ali, additional

Published
2017
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170. CMOS Luminescence Imager With Ambient Light Compensation and Lifetime to Frequency Conversion.

Author

Fu, Guoqing and Sonkusale, Sameer

Abstract

This paper presents a novel ${\text{32}}\times {\text{64}}$ CMOS image sensor for luminescence imaging with direct lifetime-dependent digital pulse frequency modulated output. Recently reported parasitic insensitive multicycle charge modulation scheme is applied to accumulate photon-generated charges in discrete programmable time windows over multiple exposures. An autoreset pulse serving as the digital output is generated by comparing the multicycle charge integrated output with a reference threshold. The detected luminescence's lifetime is extracted by monitoring the frequency in this digital pulse. To compensate for the background photocurrent generated by ambient light and built-in offset, a charge pump based calibration circuitry is also proposed. Driven by a 10-KHz clock signal with 20-μs pulse width as the integration time window, the proposed circuitry can achieve $\text{93 Hz/}(\mu \text{W/cm}^{2})$ responsivity and ${\text{19 nW/cm}}^{2}$ resolution at 575 nm wavelength. It has lifetime resolution of 8 ns. The proposed sensor chip was applied for lifetime measurement of a Ru(dpp)3(PF6)2 fluorescent sample whose lifetime was estimated to be 4.2 μs. A two-dimensional luminescence intensity and lifetime images of a single white LED have also been obtained to further validate its functionality. [ABSTRACT FROM AUTHOR]

Published
2018
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176. Oxygen-Generating Photo-Cross-Linkable Hydrogels Support Cardiac Progenitor Cell Survival by Reducing Hypoxia-Induced Necrosis

Author

Alemdar, Neslihan, primary, Leijten, Jeroen, additional, Camci-Unal, Gulden, additional, Hjortnaes, Jesper, additional, Ribas, Joao, additional, Paul, Arghya, additional, Mostafalu, Pooria, additional, Gaharwar, Akhilesh K., additional, Qiu, Yiling, additional, Sonkusale, Sameer, additional, Liao, Ronglih, additional, and Khademhosseini, Ali, additional

Published
2016
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180. pH-Sensing Hydrogel Fibers: Flexible pH-Sensing Hydrogel Fibers for Epidermal Applications (Adv. Healthcare Mater. 6/2016)

Author

Tamayol, Ali, primary, Akbari, Mohsen, additional, Zilberman, Yael, additional, Comotto, Mattia, additional, Lesha, Emal, additional, Serex, Ludovic, additional, Bagherifard, Sara, additional, Chen, Yu, additional, Fu, Guoqing, additional, Ameri, Shideh Kabiri, additional, Ruan, Weitong, additional, Miller, Eric L., additional, Dokmeci, Mehmet R., additional, Sonkusale, Sameer, additional, and Khademhosseini, Ali, additional

Published
2016
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181. FrontMatter.

Author

Rout, Saroj and Sonkusale, Sameer

Published
2017

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