Controlled assembly of artificial 2D materials based on the transfer of oxo-functionalized graphene

Abstract

A method is described to transfer and integrate transparent and polar 2D materials into heterostructures.

Photoluminescence Modulation of Graphene/MoS2 Heterostructures Separated by Laser-Induced Functionalization

“…Monolayer graphene was mechanically exfoliated from HOPG via PDMS and transferred to the few-layer hBN flake. According to the transfer method reported previously, the transfer process was carried out under a microscope equipped with a self-built transfer stage . The thicknesses of the exfoliated hBN and graphene were determined by optical contrast, Raman spectroscopy, and AFM.…”

“…Optical imaging and transfer processes were performed using a Nikon LV100ND microscope equipped with a selfbuilt transfer stage. 39 Raman and PL characterizations were conducted using a confocal Raman microscope (Horiba Explorer, 532 nm excitation wavelength, 0.7 μm laser spot, 1200/2400 gratings, 0.5 and 1 mW, 100× objectives) in air. The 1 mW laser power was used for the functionalization process.…”

Emerging field of few-layered intercalated 2D materials

“…Further methods are reported, 105,108–111 which are specific for materials, such as oxo-functionalized graphene, 112 TMDCs 113 or requirements due to the shape of the substrate. 114 …”

Conducting Nanofibers: Diagonal Scrolling of 2D Nanosheets into 1D Nanostructures via In Situ Self-Assembly

“…Two-dimensional (2D) layered nanostructures have shown substantial performance toward flexible electronics and magnetism owing to their unique physicochemical and electronic properties. − Subsequently, one-dimensional (1D) nanotubes, nanowires, and nanoscrolls (carbon, graphene oxide, and porphyrin) arising from scrolling of 2D nanosheets that are employed as novel nanostructures with enhanced mechanical properties have robust applications in optoelectronics, energy storage, and tissue engineering. − Over time, synthetic carbon allotropes such as graphene nanosheets and carbon nanotubes play a superior role in nanotechnology and chemotherapy − In this context, 2D nanomaterials are considered the foremost building blocks to generate 2D and 1D nanostructures via self-assembly; however, this methodology is restricted to inorganic oxides and a few organic π-conjugated systems thus far. − For example, Aida et al comprehensively investigated the transformation of amphiphilic HBC derivatives from nanosheets to nanotubes, yet their molecular structures mimic a small portion of the 2D graphene sheet. − Although a few other reports demonstrated the nanostructural transition from 2D to 1D, in situ self-assembly into graphitic nanotubes is hitherto unknown. Thus, the rational design strategy of feasible organic materials is obligatory to control the dimensionality of 2D and 1D nanostructures.…”

“…1 H NMR and MALDI-TOF-MS of P1 and P2; photophysical studies, microscopic analysis, and electrochemical impedance studies of P1 and P2 (PDF)…”