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Downscaling of Non-Van der Waals Semimetallic W ₅ N ₆ with Resistivity Preservation

https://doi.org/10.1021/acsnano.4c12155

Gao, Hongze; Zhou, Da; Ping, Lu; Wang, Zifan; Hung, Nguyen Tuan; Cao, Jun; Geiwitz, Michael; Natale, Gabriel; Lin, Yuxuan Cosmi; Burch, Kenneth Stephen; et al (January 2025, ACS Nano)

Free, publicly-accessible full text available January 28, 2026
Graphene Multiplexed Sensor for Point-of-Need Viral Wastewater-Based Epidemiology

https://doi.org/10.1021/acsabm.4c00484

Geiwitz, Michael; Page, Owen Rivers; Marello, Tio; Nichols, Marina E; Kumar, Narendra; Hummel, Stephen; Belosevich, Vsevolod; Ma, Qiong; van_Opijnen, Tim; Batten, Bruce; et al (July 2024, ACS Applied Bio Materials)

Free, publicly-accessible full text available July 15, 2025
Dual quantum spin Hall insulator by density-tuned correlations in TaIrTe4

https://doi.org/10.1038/s41586-024-07211-8

Tang, Jian; Ding, Thomas Siyuan; Chen, Hongyu; Gao, Anyuan; Qian, Tiema; Huang, Zumeng; Sun, Zhe; Han, Xin; Strasser, Alex; Li, Jiangxu; et al (March 2024, Nature)

Full Text Available
Rapid, Multianalyte Detection of Opioid Metabolites in Wastewater

https://doi.org/10.1021/acsnano.1c07094

Kumar, Narendra; Rana, Muhit; Geiwitz, Michael; Khan, Niazul Islam; Catalano, Matthew; Ortiz-Marquez, Juan C.; Kitadai, Hikari; Weber, Andrew; Dweik, Badawi; Ling, Xi; et al (March 2022, ACS Nano)

Full Text Available
Understanding Electrochemical Reaction Mechanisms of Sulfur in All‐Solid‐State Batteries through Operando and Theoretical Studies **

https://doi.org/10.1002/anie.202302363

Cao, Daxian; Sun, Xiao; Li, Fei; Bak, Seong‐Min; Ji, Tongtai; Geiwitz, Michael; Burch, Kenneth S.; Du, Yonghua; Yang, Guochun; Zhu, Hongli (April 2023, Angewandte Chemie International Edition)

Abstract Due to its outstanding safety and high energy density, all‐solid‐state lithium‐sulfur batteries (ASLSBs) are considered as a potential future energy storage technology. The electrochemical reaction pathway in ASLSBs with inorganic solid‐state electrolytes is different from Li‐S batteries with liquid electrolytes, but the mechanism remains unclear. By combining operando Raman spectroscopy and ex situ X‐ray absorption spectroscopy, we investigated the reaction mechanism of sulfur (S₈) in ASLSBs. Our results revealed that no Li₂S_8,Li₂S_6,and Li₂S₄were formed, yet Li₂S₂was detected. Furthermore, first‐principles structural calculations were employed to disclose the formation energy of solid state Li₂S_n(1≤n≤8), in which Li₂S₂was a metastable phase, consistent with experimental observations. Meanwhile, partial S₈and Li₂S₂remained at the full lithiation stage, suggesting incomplete reaction due to sluggish reaction kinetics in ASLSBs.
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