Torres Jorge, Liu Yulin, So Seth, Yi Hojoon, Park Sangho, Lee Jung-Kun, Lim Seong Chu, Yun Minhee
Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.
Department of Energy Science and Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon 16419, Republic of Korea.
ACS Appl Mater Interfaces. 2020 Oct 28;12(43):48890-48898. doi: 10.1021/acsami.0c09621. Epub 2020 Oct 16.
Interfacial effects on single-layer graphene (SLG) or multilayer graphene (MLG) properties greatly affect device performance. Thus, the effect of the interface on the temperature coefficient of resistance (TCR) on SLG and MLG due to surface-deposited core-shell metallic nanoparticles (MNPs) and various substrates was experimentally investigated. Observed substrates included glass, SiO, and SiN. We show that these modifications can be used to strongly influence SLG interface effects, thus increasing the TCR up to a 0.456% per K resistance change when in contact with the SiO substrate at the bottom surface and MNPs on the top surface. However, these surface interactions are muted in MLG due to the screening effect of nonsuperficial layers, only achieving a -0.0998% per K resistance change in contact with the bottom SiN substrate and the top MNPs. We also demonstrate contrary thermal sensitivity responses between SLG and MLG after the addition of MNP to the surface.
界面效应对单层石墨烯（SLG）或多层石墨烯（MLG）性能的影响极大地影响了器件性能。因此，通过实验研究了由于表面沉积的核壳金属纳米颗粒（MNP）和各种衬底，界面在SLG和MLG上对电阻温度系数（TCR）的影响。观察到的衬底包括玻璃、SiO和SiN。我们表明，这些修饰可用于强烈影响SLG界面效应，从而当底面与SiO衬底以及顶面与MNP接触时，使TCR高达每开尔文电阻变化0.456%。然而，由于非表面层的屏蔽效应，这些表面相互作用在MLG中减弱，与底部SiN衬底和顶部MNP接触时，每开尔文电阻变化仅达到-0.0998%。我们还证明了在表面添加MNP后，SLG和MLG之间存在相反的热灵敏度响应。
