Adv. Mater.: Programmable Negative Differential Resistance Effects Based on Self-Assembled Au@PPy Core–Shell Nanoparticle Arrays

Date:2018-07-15Keywords:Au nanoparticlesView:153


Programmable Negative  Differential Resistance Effects Based on Self-Assembled Au@PPy Core–Shell Nanoparticle Arrays


Jianzhong   Zheng a, Junchang Zhang a, Zi Wang a,   Liubiao Zhong a, Yinghui Sun a, Zhiqiang Liang a,   Youyong Li a, Lin Jiang,*a Xiaodong Chen,*b   and Lifeng Chi*a


Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative   Innovation Center of Suzhou Nano Science & Technology, Soochow University,   Suzhou, Jiangsu 215123, China.

School of Materials Science and Engineering Nanyang Technological   University, 50 Nanyang Avenue, 639798 Singapore.


The negative differential resistance (NDR) effect observed in conducting polymer/Au nanoparticle composite devices is not yet fully clarified due to the random  and disordered incorporation of Au nanoparticles into conducting polymers. It  remains a formidable challenge to achieve the sequential arrangement of  various components in an optimal manner during the fabrication of Au  nanoparticle/conducting polymer composite devices. Here, a novel  strategy for fabricating Au nanoparticle/conducting polymer composite devices  based on self-assembled Au@PPy core–shell nanoparticle arrays is  demonstrated. The interval between the two Au nanoparticles can be precisely programmed by modulating the thickness of the shell and the size of the core. Programmable NDR is achieved by regulating the spacer between two Au  nanoparticles. In addition, the Au/conducting polymer composite device  exhibits a reproducible memory effect with read–write–erase characteristics. The  sequentially controllable assembly of Au@PPy core–shell nanoparticle arrays  between two microelectrodes will simplify nanodevice fabrication and will  provide a profound impact on the development of new approaches for  Au/conducting polymer composite devices.