Roy Arpita, Dhibar Subhendu, Kumar Saurav, Some Sangita, Garg Parul, Ruidas Pradip, Bhattacharjee Subham, Bera Ashok, Saha Bidyut, Ray Soumya Jyoti
Department of Physics, Indian Institute of Technology, Patna, 801106, Bihar, India.
Colloid Chemistry Laboratory, Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, West Bengal, 713104, India.
Sci Rep. 2024 Dec 30;14(1):31619. doi: 10.1038/s41598-024-79358-3.
A highly effective method for creating a supramolecular metallogel of Ni(II) ions (NiA-TA) has been developed in our work. This approach uses benzene-1,3,5-tricarboxylic acid as a low molecular weight gelator (LMWG) in DMF solvent. Rheological studies assessed the mechanical properties of the Ni(II)-metallogel, revealing its angular frequency response and thixotropic behaviour. Field emission scanning electron microscopy (FESEM) showed a complex rocky network structure, while transmission electron microscopy (TEM) identified rod-shaped formations. Energy dispersive X-ray (EDX) mapping confirmed the chemical composition, and Fourier transform infrared spectroscopy (FTIR) alongside X-ray photoelectron spectroscopy (XPS) provided insights into the metallogel's formation mechanism. Schottky diode structures which were fabricated with this Ni(II)-metallogel exhibited notable charge transport properties. Moreover, resistive random access memory (RRAM) devices using NiA-TA demonstrated bipolar resistive switching with an ON/OFF ratio of ~ 110 and durability over 5000 cycles. In this work, logic gate circuits were designed using a 2 × 2 crossbar array. This work highlights the potential of Ni(II)-metallogels for non-volatile memory, neuromorphic computing, flexible electronics, and optoelectronics. Their easy fabrication, reliable switching, and stability make them promising candidates for advanced technologies, offering new opportunities for in-memory computing.
在我们的工作中，已经开发出一种用于制备镍（II）离子超分子金属凝胶（NiA-TA）的高效方法。该方法在N,N-二甲基甲酰胺（DMF）溶剂中使用苯-1,3,5-三羧酸作为低分子量凝胶剂（LMWG）。流变学研究评估了镍（II）金属凝胶的机械性能，揭示了其角频率响应和触变行为。场发射扫描电子显微镜（FESEM）显示出复杂的岩石状网络结构，而透射电子显微镜（TEM）则识别出棒状结构。能量色散X射线（EDX）映射证实了化学成分，傅里叶变换红外光谱（FTIR）以及X射线光电子能谱（XPS）提供了对金属凝胶形成机制的见解。用这种镍（II）金属凝胶制造的肖特基二极管结构表现出显著的电荷传输特性。此外，使用NiA-TA的电阻式随机存取存储器（RRAM）器件表现出双极电阻开关特性，开/关比约为110，耐久性超过5000次循环。在这项工作中，使用2×2交叉阵列设计了逻辑门电路。这项工作突出了镍（II）金属凝胶在非易失性存储器、神经形态计算、柔性电子学和光电子学方面的潜力。它们易于制造、可靠的开关特性和稳定性使其成为先进技术的有前途的候选者，为内存计算提供了新的机会。
