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1. Enhanced Synaptic Memory Window and Linearity in Planar In ₂ Se ₃ Ferroelectric Junctions

   https://doi.org/10.1002/adma.202413178  

   Jeon, Yu‐Rim; Kim, Dongyoon; Biswas, Chandan; Ignacio, Nicholas D; Carmichael, Patrick; Feng, Shaopeng; Lai, Keji; Kim, Dong‐Hwan; Akinwande, Deji (February 2025, Advanced Materials)

   Abstract A synaptic memristor using 2D ferroelectric junctions is a promising candidate for future neuromorphic computing with ultra‐low power consumption, parallel computing, and adaptive scalable computing technologies. However, its utilization is restricted due to the limited operational voltage memory window and low on/off current (I_ON/OFF) ratio of the memristor devices. Here, it is demonstrated that synaptic operations of 2D In₂Se₃ferroelectric junctions in a planar memristor architecture can reach a voltage memory window as high as 16 V (±8 V) and I_ON/OFFratio of 10⁸, significantly higher than the current literature values. The power consumption is 10⁻⁵ W at the on state, demonstrating low power usage while maintaining a large I_ON/OFFratio of 10⁸compared to other ferroelectric devices. Moreover, the developed ferroelectric junction mimicked synaptic plasticity through pulses in the pre‐synapse. The nonlinearity factors are obtained 1.25 for LTP, −0.25 for LTD, respectively. The single‐layer perceptron (SLP) and convolutional neural network (CNN) on‐chip training results in an accuracy of up to 90%, compared to the 91% in an ideal synapse device. Furthermore, the incorporation of a 3 nm thick SiO₂interface between the α‐In₂Se₃and the Au electrode resulted in ultrahigh performance among other 2D ferroelectric junction devices to date. 

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2. Giant memory window performance and low power consumption of hexagonal boron nitride monolayer atomristor

   https://doi.org/10.1038/s41699-025-00533-9  

   Yang, Sung_Jin; Jeon, Yu-Rim; Kim, Dongyoon; Mohan, Sivasakthya; Kutagulla, Shanmukh; Disiena, Matthew; Banerjee, Sanjay_K; Akinwande, Deji (February 2025, npj 2D Materials and Applications)
3. Elucidating the Role of Ferroelectric in Memory Window Expansion of Ferroelectric FETs With Gate-Side Injection

   https://doi.org/10.1109/TED.2025.3552013  

   Qin, Yixin; Chakraborty, Saikat; Zhao, Zijian; Ma, Sizhe; Jung, Moonyoung; Kim, Kijoon; Lim, Suhwan; Seo, Kwangyou; Kim, Kwangsoo; Kim, Wanki; et al (May 2025, IEEE Transactions on Electron Devices)
4. Development of Acid-Mediated H ₂ S/COS Donors That Respond to a Specific pH Window

   https://doi.org/10.1021/acs.joc.9b01873  

   Gilbert, Annie K.; Zhao, Yu; Otteson, Claire E.; Pluth, Michael D. (November 2019, The Journal of Organic Chemistry)
5. Wafer-scale 2D PtTe ₂ layers for high-efficiency mechanically flexible electro-thermal smart window applications

   https://doi.org/10.1039/D0NR01845G  

   Okogbue, Emmanuel; Ko, Tae-Jun; Han, Sang Sub; Shawkat, Mashiyat Sumaiya; Wang, Mengjing; Chung, Hee-Suk; Oh, Kyu Hwan; Jung, Yeonwoong (May 2020, Nanoscale)

   null (Ed.)

   Two-dimensional (2D) transition metal dichalcogenide (TMD) layers have gained increasing attention for a variety of emerging electrical, thermal, and optical applications. Recently developed metallic 2D TMD layers have been projected to exhibit unique attributes unattainable in their semiconducting counterparts; e.g. , much higher electrical and thermal conductivities coupled with mechanical flexibility. In this work, we explored 2D platinum ditelluride (2D PtTe 2 ) layers – a relatively new class of metallic 2D TMDs – by studying their previously unexplored electro-thermal properties for unconventional window applications. We prepared wafer-scale 2D PtTe 2 layer-coated optically transparent and mechanically flexible willow glasses via a thermally-assisted tellurization of Pt films at a low temperature of 400 °C. The 2D PtTe 2 layer-coated windows exhibited a thickness-dependent optical transparency and electrical conductivity of >10 6 S m −1 – higher than most of the previously explored 2D TMDs. Upon the application of electrical bias, these windows displayed a significant increase in temperature driven by Joule heating as confirmed by the infrared (IR) imaging characterization. Such superior electro-thermal conversion efficiencies inherent to 2D PtTe 2 layers were utilized to demonstrate various applications, including thermochromic displays and electrically-driven defogging windows accompanying mechanical flexibility. Comparisons of these performances confirm the superiority of the wafer-scale 2D PtTe 2 layers over other nanomaterials explored for such applications. 

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