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Mesoporous Single Atom-Cluster Fe–N/C Oxygen Evolution Electrocatalysts Synthesized with Bottlebrush Block Copolymer-Templated Rapid Thermal Annealing

https://doi.org/10.1021/acsami.3c18693

Saha, Dipankar; Yu, Hsin-Jung; Wang, Jiacheng; Prateek; Chen, Xiaobo; Tang, Chaoyun; Senger, Claire; Pagaduan, James Nicolas; Katsumata, Reika; Carter, Kenneth R; et al (March 2024, ACS Applied Materials & Interfaces)

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Stabilization of Three-Particle Excitations in Monolayer MoS ₂ by Fluorinated Methacrylate Polymers

https://doi.org/10.1021/acs.jpclett.2c01150

Hight-Huf, Nicholas; Pagaduan, James Nicolas; Katsumata, Reika; Emrick, Todd; Barnes, Michael D. (June 2022, The Journal of Physical Chemistry Letters)

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Large remnant polarization and great reliability characteristics in W/HZO/W ferroelectric capacitors

https://doi.org/10.3389/fmats.2022.969188

Asapu, Shiva; Pagaduan, James Nicolas; Zhuo, Ye; Moon, Taehwan; Midya, Rivu; Gao, Dawei; Lee, Jungmin; Wu, Qing; Barnell, Mark; Ganguli, Sabyasachi; et al (August 2022, Frontiers in Materials)

In this work, the effect of rapid thermal annealing (RTA) temperature on the ferroelectric polarization in zirconium-doped hafnium oxide (HZO) was studied. To maximize remnant polarization (2P r ), in-plane tensile stress was induced by tungsten electrodes under optimal RTA temperatures. We observed an increase in 2P r with RTA temperature, likely due to an increased proportion of the polar ferroelectric phase in HZO. The HZO capacitors annealed at 400°C did not exhibit any ferroelectric behavior, whereas the HZO capacitors annealed at 800°C became highly leaky and shorted for voltages above 1 V. On the other hand, annealing at 700 °C produced HZO capacitors with a record-high 2P r of ∼ 64 μ C cm −2 at a relatively high frequency of 111 kHz. These ferroelectric capacitors have also demonstrated impressive endurance and retention characteristics, which will greatly benefit neuromorphic computing applications.
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Polarization-Driven Asymmetric Electronic Response of Monolayer Graphene to Polymer Zwitterions Probed from Both Sides

https://doi.org/10.1021/acsami.1c13505

Hight-Huf, Nicholas; Nagar, Yehiel; Levi, Adi; Pagaduan, James Nicolas; Datar, Avdhoot; Katsumata, Reika; Emrick, Todd; Ramasubramaniam, Ashwin; Naveh, Doron; Barnes, Michael D. (October 2021, ACS Applied Materials & Interfaces)

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Electronic Tuning of Monolayer Graphene with Polymeric “Zwitterists”

https://doi.org/10.1021/acsnano.0c08624

Pagaduan, James Nicolas; Hight-Huf, Nicholas; Datar, Avdhoot; Nagar, Yehiel; Barnes, Michael; Naveh, Doron; Ramasubramaniam, Ashwin; Katsumata, Reika; Emrick, Todd (February 2021, ACS Nano)
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