Configurational Effects on Strain and Doping at Graphene-Silver Nanowire Interfaces

Abstract

Graphene shows substrate-dependent physical and electronic properties. Here, we presented the interaction between single-layer graphene and silver nanowire (AgNW) in terms of physical straining and doping. We observed a snap-through event for single-layer graphene/AgNW at a separation of AgNWs of 55 nm, beyond the graphene suspended over the nanowires. The adhesion force between the Atomic Force Microscopy (AFM) tip apex and the suspended graphene was measured as higher than the conformed one by 1.8 nN. The presence of AgNW modulates the Fermi energy level of graphene and reduces the work function by 0.25 eV, which results in n-type doping. Consequently, a lateral p-n-p junction is formed with single AgNW. The correlation Raman plot between G-2D modes reveals the increment of strain in graphene of 0.05% due to the curvature around AgNW, and 0.01% when AgNW lies on the top of graphene. These results provide essential information in inspecting the physical and electronic influences from AgNW.

Localised strain and doping of 2D materials

“…13c) orientation. 5 In the former system, the underneath AgNW does not lead to discernible doping but induces tensile strain up to 0.06% to the upper graphene layer, indicating the conformation of graphene by the AgNW. In latter (Fig.…”

“…Hybrid between graphene and silver nanowire (AgNW) has recently attracted considerable interest in light of the conductivity enhancement in transparent electrodes as well as the improved performance of photovoltaic devices due to surface plasmon resonance. 5,110,116 It is thus rational to study the induced strain and doping in the vertically stacked heterostructure in either Gr/AgNW (Fig. 13 a and b) and AgNW/Gr (Fig.…”

Highly flexible Ag nanowire network covered by a graphene oxide nanosheet for high-performance flexible electronics and anti-bacterial applications

“…The 2D peak is a peak arisen by the second-order phonon mode between two in-plane transverse optical phonons [57,[69][70][71]. Studies on the interaction of Raman effect occurring in the hybrid system of silver nanostructures and graphene have been extensively reported [72][73][74], and AgNWs is known to have more influence on mechanical strain than charge transfer to graphene [75]. Unlike graphene deposited on a flat substrate, the graphene deposited on a rough surface such as Ag NWs network suffers tensile stress by the curvature of AgNWs.…”

Dipole-Modulated Charge Transport through PNP-Type Single-Molecule Junctions

“…1−8 The internal energy band structure of these devices is determined by the contact potential at the interface and space charge distribution, which has a great impact on device performance. 9−15 There are mainly three methods to adjust the energy band in devices, including doping, 16 lateral carrier injection, 17 and longitudinal electric field. 18 Through reasonably designing the chemical structure of a molecule or adjusting the chemical environment within the molecule, the energy band of a single molecule can also be adjusted, which regulates charge transport at the single-molecule level and continues device miniaturization according to Moore′s law.…”

“…Energy band engineering in electronic and optoelectronic devices is of great importance for the semiconductor industry, which can determine the function and performance of devices. In terms of macroscopic devices, many functional devices, such as bipolar junction transistors (BJTs) and field-effect transistors (FETs), can be constructed using appropriate energy bands to obtain high gain and an on–off switching ratio. − The internal energy band structure of these devices is determined by the contact potential at the interface and space charge distribution, which has a great impact on device performance. − There are mainly three methods to adjust the energy band in devices, including doping, lateral carrier injection, and longitudinal electric field . Through reasonably designing the chemical structure of a molecule or adjusting the chemical environment within the molecule, the energy band of a single molecule can also be adjusted, which regulates charge transport at the single-molecule level and continues device miniaturization according to Moore′s law.…”