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. 2017 Dec 12;12:8725–8734. doi: 10.2147/IJN.S149536

Figure 2.

Figure 2

RRS spectra of the GONR systems.

Notes: (A) HP–hCG–GONR–HAuCl4–TCA system – a: 35 nmoL/L HP +240 ng/mL GONR +0.167 mmoL/L HCl +0.34 mmoL/L TCA +5.6 μmoL/L HAuCl4; b: a+0.33 ng/mL hCG; c: a+1 ng/mL hCG; d: a+2 ng/mL hCG; e: a+4 ng/mL hCG; f: a+6 ng/mL hCG; g: a+10 ng/mL hCG; and h: a+13.33 ng/mL hCG. The inset graph was the working curve. (B) GONR–HAuCl4–TCA system – a: 0.167 mmoL/L HCl +0.34 mmoL/L TCA+ 5.6 μmoL/L HAuCl4; b: a+16 ng/mL GONR; c: a+40 ng/mL GONR; d: a+80 ng/mL GONR; e: a+120 ng/mL GONR; f: a+160 ng/mL GONR; g: a+240 ng/mL GONR; and h: a+320 ng/mL GONR. (C) HP–GONR–HAuCl4–TCA system – a: 240 ng/mL GONR +0.167 mmoL/L HCl +0.34 mmoL/L TCA +5.6 μmoL/L HAuCl4; b: a+1.4 nmoL/L HP; c: a+3.5 nmoL/L HP; d: a+7 nmoL/L HP; e: a+10.5 nmoL/L HP; f: a+14 nmoL/L HP; g: a+21 nmoL/L HP; and h: a+28 nmoL/L HP.

Abbreviations: C, concentration; I, intensity; RRS, resonance Rayleigh scattering; GONR, graphene oxide nanoribbon; HP, hCG polypeptide; hCG, human chorionic gonadotropin; TCA, trisodium citrate.