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Evaluation of the Photothermal Properties of a Reduced Graphene Oxide/Arginine Nanostructure for Near-Infrared Absorption Publisher Pubmed



Hashemi M1, 2, 4 ; Omidi M5 ; Muralidharan B2, 3 ; Smyth H4 ; Mohagheghi MA6 ; Mohammadi J1 ; Milner TE2
Authors
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Authors Affiliations
  1. 1. Biomedical Engineering Department, Faculty of New Sciences and Technologies, University of Tehran, Tehran, 14395-1561, Iran
  2. 2. Biomedical Engineering Department, University of Texas at Austin, Austin, 78712, TX, United States
  3. 3. Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, 78712, TX, United States
  4. 4. Division of Pharmaceutics, College of Pharmacy, University of Texas at Austin, Austin, 78712, TX, United States
  5. 5. Protein Research Centre, Shahid Beheshti University, GC, Velenjak, Tehran, 1985717443, Iran
  6. 6. Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, 1419733141, Iran

Source: ACS Applied Materials and Interfaces Published:2017


Abstract

Strong near-infrared (NIR) absorption of reduced graphene oxide (rGO) make this material a candidate for photothermal therapy. The use of rGO has been limited by low stability in aqueous media due to the lack of surface hydrophilic groups. We report synthesis of a novel form of reduced graphene-arginine (rGO-Arg) as a nanoprobe. Introduction of Arg to the surface of rGO not only increases the stability in aqueous solutions but also increases cancer cell uptake. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) images are recorded to characterize the morphology of rGO-Arg. Fourier transform infrared (FTIR), X-ray photoelectron spectra (XPS), Raman, and UV-vis spectroscopy are utilized to analyze the physiochemical properties of rGO-Arg. Interaction of rGO-Arg with 808 nm laser light has been evaluated by measuring the absorption cross section in response to periodically modulated intensity to minimize artifacts arising from lateral thermal diffusion with a material scattering matched to a low scattering optical standard. Cell toxicity and cellular uptake by MD-MB-231 cell lines provide supporting data for the potential application of rGO-Arg for photothermal therapy. Absorption cross-section results suggest rGO-Arg is an excellent NIR absorber that is 3.2 times stronger in comparison to GO. © 2017 American Chemical Society.
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