Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan.
Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
Macromol Rapid Commun. 2019 Jun;40(12):e1900115. doi: 10.1002/marc.201900115. Epub 2019 Apr 25.
Donor-acceptor crosslinked poly[poly(ethylene glycol) methyl ether-methacrylate]-block-poly[1,1'-bis(2-ethylpentyl)-6-methyl-6'-(5-methyl-3-vinylthiophen-2-yl)-[3,3'-biindoline]-2,2'-dione] (poly(PEGMA) -b-poly(VTIID) ) nanoparticles with various vinylthiophene donor/isoindigo acceptor ratios are synthesized successfully. The prepared nanoparticles have uniform sizes and well-defined core-shell nanostructures. The intramolecular charge transfer is effectively enhanced due to the incorporation of acceptor groups after the crosslinking reaction. A transistor memory device is assembled using the synthesized polymer and has nonvolatile flash-type memory and amphiphilic trapping behavior. The optimized devices exhibit a significant memory window of approximately 38 V, a retention ability of over 10 s, and an endurance of at least 100 cycles. This study examines multiple applications of crosslinked core-shell nanoparticles, which demonstrates their promise as charge-storage dielectric materials for use in organic memory devices.
成功合成了具有不同乙烯基噻吩给体/吲哚二酮受体比例的供体-受体交联聚[聚（乙二醇）甲基醚甲基丙烯酸酯]-嵌段-聚[1,1'-双（2-乙基戊基）-6-甲基-6'-(5-甲基-3-乙烯基噻吩-2-基）-[3,3'-联吲哚]-2,2'-二酮]（poly(PEGMA)-b-poly(VTIID)）纳米粒子。所制备的纳米粒子具有均匀的尺寸和明确的核壳纳米结构。由于交联反应后引入了受体基团，有效地增强了分子内电荷转移。使用合成的聚合物组装了晶体管存储器件，具有非易失性闪存型记忆和两亲性俘获行为。优化后的器件具有约 38 V 的显著存储窗口、超过 10 s 的保持能力和至少 100 个循环的耐久性。本研究考察了交联核壳纳米粒子的多种应用，证明了它们作为用于有机存储器件的电荷存储介电材料的应用前景。
