DataVXACS NanoPaper
journal article·2020-03-24

Direct Growth of Wafer-Scale, Transparent, p-Type Reduced-Graphene-Oxide-like Thin Films by Pulsed Laser Deposition

M. M. Juvaid, Soumya Sarkar, Pranjal Kumar Gogoi, Siddhartha Ghosh, Meenakshi Annamalai, Yung-Chang Lin, Saurav Prakash, Sreetosh Goswami, Changjian Li, Sonu Hooda, Hariom Jani, Mark B. H. Breese, Andrivo Rusydi, Stephen John Pennycook, Kazu Suenaga, M. S. Ramachandra Rao, Thirumalai Venkatesan

ACS Nano· Volume 14· Issue 3
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Source abstract

Abstract

Reduced graphene oxide (rGO) has attracted significant interest in an array of applications ranging from flexible optoelectronics, energy storage, sensing, and very recently as membranes for water purification. Many of these applications require a reproducible, scalable process for the growth of large-area films of high optical and electronic quality. In this work, we report a one-step scalable method for the growth of reduced-graphene-oxide-like (rGO-like) thin films via pulsed laser deposition (PLD) of sp2 carbon in an oxidizing environment. By deploying an appropriate laser beam scanning technique, we are able to deposit wafer-scale uniform rGO-like thin films with ultrasmooth surfaces (roughness <1 nm). Further, in situ control of the growth environment during the PLD process allows us to tailor its hybrid sp2–sp3 electronic structure. This enables us to control its intrinsic optoelectronic properties and helps us achieve some of the lowest extinction coefficients and refractive index values (0.358 and 1.715, respectively, at 2.236 eV) as compared to chemically grown rGO films. Additionally, the transparency and conductivity metrics of our PLD grown thin films are superior to other p-type rGO films and conducting oxides. Unlike chemical methods, our growth technique is devoid of catalysts and is carried out at lower process temperatures. This would enable the integration of these thin films with a wide range of material heterostructures via direct growth.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsElectronic materialsCatalysis & surfacesMaterials processing

OpenAlex topics: Graphene research and applications · Diamond and Carbon-based Materials Research · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nano Functional Materials Technology Centre, Material Science and Research Centre, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India

NUSNNI-NanoCore, National University of Singapore, Singapore 117411

Department of Physics, National University of Singapore, Singapore 117542

NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456

National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305−8565, Japan

Department of Applied Sciences, Tezpur University, Napaam 784028, India

Department of Physics, SRM University − AP, Amaravati, Andhra Pradesh 522502, India

Yale-NUS College, 16 College Avenue West, Singapore 138527

Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575

Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore 117603

Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583

Funding

Ministry of Education - Singapore · National Research Foundation Singapore · Department of Science and Technology, Ministry of Science and Technology · Singapore-Berkeley Research Initiative for Sustainable Energy

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