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Multifunctional Metal‐oxide Integrated Monolayer Graphene Heterostructures for Planar, Flexible, and Skin‐mountable Device Applications

Multifunctional Metal‐oxide Integrated Monolayer Graphene Heterostructures for Planar, Flexible, and Skin‐mountable Device Applications
Mudusu, DevikaNandanapalli, Koteeswara ReddyMoon, Geon DaeLee, Sungwon
Issued Date
Nano Energy, v.88
Author Keywords
Energy devicesFlexible devicesMetal-oxide integrated graphene layersSkin-mountable structuresUltrathin heterostructuresWearable optoelectronics
Metal-oxide integrated graphene layerMultifunctional metal oxideGraphene devicesII-VI semiconductorsMechanical stabilityMetalsMonolayersZinc oxideSkin-mountable structureUltra-thinUltrathin heterostructureWearable optoelectronicGrapheneCo$-3$/O$-4$Energy devicesFlexible deviceMetal-oxide
The adoption of nanostructured metal-oxides integrated graphene monolayers-based heterostructures appears to be a promising approach for enhancing the performance of various devices. However, precisely controlled growth of such unique heterostructures without disturbing the monolayer graphene characteristics remains a challenging task especially over a large area with good uniformity. Herein, ultrathin metal-oxide (p-Co3O4 and n-ZnO) nanostructures (MONSs) integrated graphene monolayer (GML) heterostructures are carefully developed by fascinating the graphene native defects while nucleation and growth of MONSs. Metal-oxides integrated graphene monolayers with lower material densities (≤ 30 μg/cm2) significantly enhanced the quality (2D/G ~5–9) and reduced the electrical resistance (11–17 Ω/sq.) of graphene layers, whereas the heterostructures developed with higher densities possess predominant water-oxidation characteristics than that of their individual components. Further, the Co3O4/GML heterostructures-based micro-supercapacitors, fabricated over 25 µm polyimide sheets, showed excellent mechanical stability and flexibility with a volumetric and specific capacitance of 7.76 F/cm3 and 1.27 F/g, respectively. The ZnO/GML heterostructures designed over micron thick parylene film displayed exciting photoresistor characteristics with photosensitivity of ~1.54 and superb flexibility and skin-mountability. Synergistic multifunctional characteristics of these ultrathin heterostructures offer the possibility to realize various eco-friendly ultrathin as well as skin-mountable energy and health monitoring devices. © 2021
Elsevier Ltd
Related Researcher
  • 이성원 Lee, Sungwon 화학물리학과
  • Research Interests Ultrathin Device Fabrication; Bio sensors Development; Functional Material Development
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Department of Physics and Chemistry Bio-Harmonized Device Lab 1. Journal Articles


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