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Your search keyword '"Ahmed, Zabir"' showing total 18 results
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18 results on '"Ahmed, Zabir"'

6. CMU Array: A 3D nanoprinted, fully customizable high-density microelectrode array platform

Author

Saleh, Mohammad Sadeq, primary, Ritchie, Sandra M., additional, Nicholas, Mark A., additional, Gordon, Hailey L., additional, Hu, Chunshan, additional, Jahan, Sanjida, additional, Yuan, Bin, additional, Bezbaruah, Rriddhiman, additional, Reddy, Jay W., additional, Ahmed, Zabir, additional, Chamanzar, Maysamreza, additional, Yttri, Eric A., additional, and Panat, Rahul P., additional

Published
2022
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7. Flexible optoelectric neural interfaces

Author

Ahmed, Zabir, primary, Reddy, Jay W, additional, Malekoshoaraie, Mohammad H, additional, Hassanzade, Vahid, additional, Kimukin, Ibrahim, additional, Jain, Vishal, additional, and Chamanzar, Maysamreza, additional

Published
2021
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8. Flexible optoelectrical neural implants

Author

Reddy, Jay, primary, Kimukin, Ibrahim, additional, Lassiter, Maya, additional, Ahmed, Zabir, additional, Malekoshoaraie, Mohammad H., additional, Jain, Vishal, additional, Stewart, Luke, additional, Barth, Alison, additional, Towe, Elias, additional, and Chamanzar, Maysamreza, additional

Published
2021
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10. An efficient plasmonic photovoltaic structure using silicon strip-loaded geometry.

Author

Awal, M. A., Ahmed, Zabir, and Talukder, Muhammad Anisuzzaman

Subjects
*SOLAR energy, *WAVELENGTHS, *SURFACE plasmon resonance, *LIGHT absorption, *METAL nanoparticles
Abstract

We show that a silicon thin-film photovoltaic structure with silicon strips on the top and grooves on the silver back contact layer can absorb incident solar energy over a broad spectral range. The silicon strips on the top scatter the incident light and significantly help couple to the photonic modes in the smaller wavelength range. The grooves on the silver back contact layer both scatter the incident light and help couple to the photonic modes and resonant surface plasmon polaritons. We find an increase of ~46% in total integrated solar absorption in the proposed strip-loaded structure compared to that in a planar thin film structure of same dimensions. The proposed structure offers simpler fabrication compared to similar plasmonic-inspired designs. [ABSTRACT FROM AUTHOR]

Published
2015
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13. Flexible Ultra-resolution Subdermal EEG Probes

Author

Ahmed, Zabir, primary, Reddy, Jay, additional, Deshpande, Kaustubh, additional, Krishnan, Ashwati, additional, Venkatesh, Praveen, additional, Kelly, Shawn, additional, Grover, Pulkit, additional, and Chamanzar, Maysamreza, additional

Published
2018
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17. Volumetric mesoscopic electrophysiology: a new imaging modality for the non-human primate.

Author

Teichert T, Papp L, Vincze F, Burns N, Goodell B, Ahmed Z, Holmes A, Gray CM, Chamanzar M, and Gurnsey K

Abstract

The primate brain is a densely interconnected organ whose function is best understood by recording from the entire structure in parallel, rather than parts of it in sequence. However, available methods either have limited temporal resolution (functional magnetic resonance imaging), limited spatial resolution (macroscopic electroencephalography), or a limited field of view (microscopic electrophysiology). To address this need, we developed a volumetric, mesoscopic recording approach ( MePhys ) by tessellating the volume of a monkey hemisphere with 992 electrode contacts that were distributed across 62 chronically implanted multi-electrode shafts. We showcase the scientific promise of MePhys by describing the functional interactions of local field potentials between the more than 300,000 simultaneously recorded pairs of electrodes. We find that a subanesthetic dose of ketamine -believed to mimic certain aspects of psychosis- can create a pronounced state of functional disconnection and prevent the formation of stable large-scale intrinsic states. We conclude that MePhys provides a new and fundamentally distinct window into brain function whose unique profile of strengths and weaknesses complements existing approaches in synergistic ways.

Published
2024
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18. Large-scale multimodal surface neural interfaces for primates.

Author

Belloir T, Montalgo-Vargo S, Ahmed Z, Griggs DJ, Fisher S, Brown T, Chamanzar M, and Yazdan-Shahmorad A

Abstract

Deciphering the function of neural circuits can help with the understanding of brain function and treating neurological disorders. Progress toward this goal relies on the development of chronically stable neural interfaces capable of recording and modulating neural circuits with high spatial and temporal precision across large areas of the brain. Advanced innovations in designing high-density neural interfaces for small animal models have enabled breakthrough discoveries in neuroscience research. Developing similar neurotechnology for larger animal models such as nonhuman primates (NHPs) is critical to gain significant insights for translation to humans, yet still it remains elusive due to the challenges in design, fabrication, and system-level integration of such devices. This review focuses on implantable surface neural interfaces with electrical and optical functionalities with emphasis on the required technological features to realize scalable multimodal and chronically stable implants to address the unique challenges associated with nonhuman primate studies., Competing Interests: The authors declare no competing interest., (© 2022 The Author(s).)

Published
2022
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