Das, Saptarshi - The Pennsylvania State University - Department of Engineering Science and Mechanics

个人简介

Dr. Das received his B.Eng. degree (2007) in Electronics and Telecommunication Engineering from Jadavpur University, India, and Ph.D. degree (2013) in Electrical and Computer Engineering from Purdue University. He was a Postdoctoral Research Scholar (2013-2015) and Assistant Research Scientist (2015-2016) at Argonne National Laboratory (ANL). Dr. Das joined the Department of Engineering Science and Mechanics (ESM) at Penn State University in January 2016. Dr. Das was the recipient of the Young Investigator Award from the United States Air Force Office of Scientific Research in 2017 and the National Science Foundation (NSF) CAREER award in 2021. Das Research Group at Penn State leads a new multidisciplinary area of science, namely biomimetic sensing, neuromorphic computing, and hardware security inspired by natural designs found in the animal world that allow evolutionary success in resource-constrained environments.

研究领域

We are an experimental research group interested in developing bio-inspired and neuromorphic devices for sensing, compute, storage, and security applications using novel nanomaterials such as two-dimensional (2D) materials.

近期论文

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Zhu, H., Nayir, N., Choudhury, T., Bansal, A., Huet, B., Zhang, K., Puretzky, A., Bachu, S., York, K., Mc Knight, T., Trainor, N., Oberoi, A., Wang, K., Das, S., Makin, R., Durbin, S., Huang, S., Alem, N., Crespi, V., Van Duin, A., Step engineering for nucleation and domain orientation control in WSe2 epitaxy on c-plane sapphire. Nature Nanotechnology (2023) Schranghamer, T. F., Stepanoff, Trainor, N., Redwing, J. M., Wolfe, D. F., Das, S. Ultra-scaled phototransistors based on monolayer MoS2. Device, 1 (4), 100102, (2023). Wali, A., & Das, S. Two-Dimensional Memtransistors for Non-Von Neumann Computing: Progress and Challenges. Advanced Functional Materials, 2308129, (2023). Ghosh, S., Pannone, A., Sen, D., Wali, A., Ravichandran, H., Das, S. An All 2D Bio-inspired Gustatory Circuit for Mimicking Physiology and Psychology of Feeding Behavior. Nature Communications, 14, 6021, (2023). Sadaf, M., Sakib, N., Pannone, A., Ravichandran, H., Das, S. A Bio-inspired Visuotactile Neuron for Multisensory Integration. Nature Communications, 14, 5729, (2023). Ravichandran, H., Sen, D., Wali, A., Schranghamer, T. F., Trainor, N., Redwing, J. M., Ray, B., Das, S. A Peripheral-Free True Random Number Generator Based on Integrated Circuits Enabled by Atomically Thin Two-Dimensional Materials. ACS Nano, 17 (17), 16817-16826, (2023). Torsi, R., Munson, K. T., Pendurthi, R., Marques, E., Troeye, B. V., Huberich, L., Schuler, B., Feidler, M., Wang, K., Pourtois, G., Das, S., Asbury, J. B., Lin, Y., Robinson, J. A. Dilute Rhenium Doping, and its Impact on Defects in MoS2. ACS Nano, 17 (16), 15629-15640, (2023). Ravichandran, H., Knobloch, T., Pannone, A., Karl, A., Stampfer, B., Waldhoer, D., Zheng, Y., Sakib, N., Sadaf, M., Pendurthi, M., Torsi, R., Robinson, J. A., Grasser, T., Das, S. Observation of Rich Defect Dynamics in Monolayer MoS2. ACS Nano, 17 (15), 14449-14460, (2023). Schranghamer, T. F., Pannone, A., Ravichandran, H., Stepanoff, S. P., Trainor, N., Redwing, J. M., Wolfe, D. E., Das, S. Radiation Resilient Two-Dimensional Electronics. ACS Applied Materials & Interfaces, 15 (22), 26946–26959, (2023). Ghosh, S., Zheng, Y., Subbulakshmi Radhakrishnan, S., Schranghamer, T. F., Das, S. A Graphene-Based Straintronic Physically Unclonable Function. Nano Letters, 23 (11), 5171–5179, (2023). Schranghamer, T. F., Sakib, N., Sadaf, M., Subbulakshmi Radhakrishnan, S., Pendurthi, R., Agyapong, A. D., Stepanoff, S. P., Torsi, R., Chen, C., Redwing, J. M., Robinson, J. A., Wolfe, D. F., Mohney, S. E., Das, S. Ultra-scaled Contacts to Monolayer MoS2 Field Effect Transistors. Nano letters, 23 (8), 3426-3434, (2023). Zheng, Y., Sen, D., Das, S., & Das, S. Graphene Strain-Effect Transistor with Colossal ON/OFF Current Ratio Enabled by Reversible Nanocrack Formation in Metal Electrodes on Piezoelectric Substrates. Nano Letters, 23 (7), 2536-2543, (2023). Wali, A., & Das, S. Hardware and Information Security Primitives Based on Two‐Dimensional Materials and Devices. Advanced Materials, 35 (18), 2205365, (2023). Jayachandran, D., Pannone, A., Das, M., Schranghamer, T. F., Sen, D., & Das, S. Insect-Inspired, Spike-Based, in-Sensor, and Night-Time Collision Detector Based on Atomically Thin and Light-Sensitive Memtransistors. ACS Nano, 17, 2, 1068–1080, (2023). Ravichandran, H., Zheng, Y., Schranghamer, T. F., Trainor, N., Redwing, J. M., & Das, S. A Monolithic Stochastic Computing Architecture for Energy Efficient Arithmetic. Advanced Materials, 35 (2), 2206168, (2023). Jayachandran, D., Pannone, A., Das, M., Schranghamer, T. F., Sen, D., & Das, S. Insect-Inspired, Spike-Based, in-Sensor, and Night-Time Collision Detector Based on Atomically Thin and Light-Sensitive Memtransistors. ACS Nano. [In press – forthcoming December 2022]. Dodda, A., Jayachandran, D., Pannone, A., Trainor, N., Stepanoff, S. P., Steves, M. A., Subbulakhshmi Radhakrishnan, S., Bachu, S., Ordonez, C. W., Shallenberger, J. R., Redwing, J. M., Knappenberger, K., Wolfe, D. E., & Das, S. Active pixel sensor matrix based on monolayer MoS2 phototransistor array. Nature Materials, 21, 1379–1387. (Cover Article) Dodda, A., Jayachandran, D., Pannone, A., Subbulakhshmi Radhakrishnan, S., Trainor, N., Redwing, J. M., & Das, S. A Bio-inspired and Low-power 2D Machine Vision with Adaptive Machine Learning and Forgetting. ACS Nano, 16, 12, 20010–20020, (2022). Subbulakshmi Radhakrishnan, S., Dodda, A., & Das, S. An All-in-One Bio-inspired Neural Network. ACS Nano, 16, 12, 20100–20115, (2022). Chakrabarti, S., Wali, A., Ravichandran, H., Kundu, S., Schranghamer, T. F., Basu, K., & Das, S. Logic Locking of Integrated Circuits Enabled by Nanoscale MoS2-Based Memtransistors. ACS Applied Nano Materials, 5, 10, 14447-14455. Sebastian, A., Pendurthi, R., Kozhakhmetov, A., Trainor, N., Robinson, J. A., Redwing, J. M., & Das, S. Two-dimensional materials-based probabilistic synapses and reconfigurable neurons for measuring inference uncertainty using Bayesian neural networks. Nature Communications, 13, 6139, (2022). Zheng, Y., Ravichandran, H., Schranghamer, T. F., Trainor, N., Redwing, J. M., & Das, S. Hardware implementation of Bayesian network based on two-dimensional memtransistors. Nature communications, 13, 5578, (2022). Lei, Y., Zhang, T., Lin, Y. C., Granzier-Nakajima, T., Bepete, G., Kowalczyk, D. A., Lin, Z., Zhou, D., Schranghamer, T. F., Dodda, A., Sebastian, A., Chen, Y., Liu, Y., Pourtois, G., Kempa, T. J., Schuler, B., Edmonds, M. T., Quek, S. Y., Wurstbauer, U., Wu, S. M., Glavin, N. R., Das, S., Dash, S. P., Redwing, J. M., Robinson, J. A., & Terrones, M. (2022). Graphene and Beyond: Recent Advances in Two-Dimensional Materials Synthesis, Properties, and Devices. ACS Nanoscience Au, 2, 6, 450–485 (2022). Das, S., & Das, S. Digital Keying Enabled by Reconfigurable Two‐dimensional Modulators. Advanced Materials, 2203753, (2022). Pendurthi, R., Jayachandran, D., Kozhakhmetov, A., Trainor, N., Robinson, J. A., Redwing, J. M., & Das, S. Heterogeneous integration of atomically thin semiconductors for non‐von Neumann CMOS. Small, 18(33), 2202590, (2022). Dodda, A., Trainor, N., Redwing, J., & Das, S. All-in-one, bio-inspired, and low-power crypto engines for near-sensor security based on two-dimensional memtransistors. Nature Communications, 13, 3587, (2022). Austin, D., Miesle, P., Sessions, D., Motala, M., Moore, D. C., Beyer, G., Miesle, A., Sarangan, A., Sebastian, A., Das, S., Puthirath, A. B., Zhang, X., Hachtel, J., Ajayan, P. M., Back, T., Stevenson, P. R., Brothers, M., Kim, S. S., Buskohl, P., Rao, R., Muratore, C., & Glavin, N. R. High Throughput Data-Driven Design of Laser-Crystallized 2D MoS2 Chemical Sensors: A Demonstration for NO2 Detection. ACS Applied Nano Materials, 5, 5, 7549–7561. Subbulakshmi Radhakrishnan, S., Chakrabarti, S., Sen, D., Das, M., Schranghamer, T., Sebastian, A., & Das. S. A Sparse and Spike-timing-based Adaptive Photo Encoder for Augmenting Machine Vision for Spiking Neural Networks. Advanced Materials, 34, 48, 2202535, (2022). Rai, S., Singh, V. K., Pendurthi, R., Nasr, J. R., Das, S., & Srivastava, A. Unveiling the electrical and photo-physical properties of intrinsic n-type 2D WSe2 for high performance field-effect transistors. Journal of Applied Physics, 131(9), 094301, (2022). Sebastian, A., Das, S. & Das, S. An Annealing Accelerator for Ising Spin Systems Based on In-Memory Complementary 2D FETs. Advanced Materials, 34 (4), 2107076, (2022). Das, S. & Elias, A. L. Leaving defects out of 2D molybdenum disulfide. Nature Electronics, 5 (1), 19-20, (2022). Oberoi, A., Dodda, A., Liu, H., Terrones, M., & Das, S. Secure Electronics Enabled by Atomically Thin and Photosensitive Two- Dimensional Memtransistors. ACS Nano, 15, 12, 19815–19827, (2021). Das, S, Sebastian, A., Pop, E., McClellan, C. J., Franklin, A. D., Grasser, T., Knobloch, T., Illarionov, Y., Penumatcha, A. V., Appenzeller, J., Chen, Z., Zhu, W., Asselberghs, I., Li, L., Avci, U. E., Bhat, N., Anthopoulos, T. D., & Singh, R. Transistors based on two-dimensional materials for future integrated circuits. Nature Electronics, 4 (11), 786-799, (2021). Wali, A., Ravichandran, H., & Das, S. A Machine Learning Attack Resilient True Random Number Generator Based on Stochastic Programming of Atomically Thin Transistors. ACS Nano, 15 (11), 17804–17812, (2021). Dodda, A., & Das, S. Demonstration of Stochastic Resonance, Population Coding, and Population Voting Using Artificial MoS2 Based Synapses. ACS Nano, 15 (10), 16172–16182, (2021). Kozhakhmetov,A., Stolz, S., Tan, A. M. Z., Pendurthi, R., Bachu, S., Turker, F., Alem, N., Kachian, J., Das, S., Hennig, R. G., Gröning, O., Schuler, B., & Robinson, J. A. Controllable p‐Type Doping of 2D WSe2 via Vanadium Substitution. Advanced Functional Materials, 31 (42), 2105252, (2021). Schranghamer, T. F., Sharma, M., Singh, R., & Das, S. Review and comparison of layer transfer methods for two-dimensional materials for emerging applications. Chemical Society Reviews, 50, 11032-11054, (2021). Dodda, A., Subbulakshmi Radhakrishnan, S., Schranghamer, T. F., Buzzell, D., Sengupta, P., & Das, S. Graphene-based physically unclonable functions that are reconfigurable and resilient to machine learning attacks. Nature Electronics, 4 (5), 364-374, (2021). Subbulakshmi Radhakrishnan, S., Sebastian, Oberoi, A., Das, S., & Das, S. A biomimetic neural encoder for spiking neural network. Nature Communications, 12 (1), 2143, (2021). A., Sebastian, Pendurthi, R., A., Choudhury, T. H., Redwing, J. M., & Das, S. Benchmarking monolayer MoS2 and WS2 field-effect transistors. Nature Communications, 12 (1), 693, (2021). Wali, A., Kundu, S., Arnold, A. J., Zhao, G., Basu, K., & Das, S. Satisfiability Attack-Resistant Camouflaged Two-Dimensional Heterostructure Devices. ACS Nano, 15 (2), 3453-3467, (2021). Kozhakhmetov, A., Stolz, S., Tan, A. M. Z., Pendurthi, R., Bachu, S., Turker, F., Alem, N., Kachian, J., Das, S., Hennig, R. G., Gröning, O., Schuler, B., Robinson, J. A. Controllable p‐Type Doping of 2D WSe2 via Vanadium Substitution. Advanced Functional Materials, 2105252, (2021). Chubarov, M., Choudhury, T. H., Hickey, D. R., Bachu, S., Zhang, T., Sebastian, A., Bansal, Zhu, H., Trainor, N., Das, S., Terrones, M., Alem, M., & Redwing, J. M. Wafer-Scale Epitaxial Growth of Unidirectional WS2 Monolayers on Sapphire. ACS Nano, 2021, 15, 2, 2532–2541, (2021).