Graphene oxide–metal nanocomposites for cancer biomarker detection

We report a universal protocol for the in situ bioinspired green synthesis of metal (Pd, Pt, Ag and Au) nanoparticles (mNPs) on simultaneously reduced graphene oxide (rGO) sheets using a black pepper extract (BPE) for quantification and kinetic analysis of epidermal growth factor receptor (ErbB2) for application to breast cancer diagnostics. The phytochemicals present in BPE were found to assist the reduction, stabilization, and surface addition of mNPs onto rGO sheets. The antioxidants present in the BPE assist the formation of a “green corona” on the surface of derived G-mNPs@rGO (G-Pd@rGO, G-Pt@rGO, G-Ag@rGO, and G-Au@rGO) sheets as corroborated by DLS and FT-IR experiments. These bioinspired derivatives provided biocompatible surfaces, resulting in higher cell viability compared to that of chemically derived composites, C-mNPs@rGO (C-Pd@rGO, C-Pt@rGO, C-Ag@rGO, and C-Au@rGO). Toxicity was found to be drastically reduced for green-corona assisted derivatives of GO due to strong antioxidant properties of the phytochemicals present in BPE. In addition, a comparative analytical study of the quantification and kinetics of breast cancer biomarkers using both G-mNPs@rGO and C-mNPs@rGO nanocomposites was carried out. The G-mNPs@rGO nanosheets can be employed for ultrasensitive detection of ErbB2 concentration from 1.0 fM to 0.5 μM.

• Publication year

  2017

• Venue

  RSC Advances

• Publication date

  2017-07-17

• Fields of study

  Medicine, Materials Science, Chemistry

• Identifiers
  DOI 10.1039/C7RA05491B
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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