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. 2016 Aug 18;6(3):44. doi: 10.3390/bios6030044

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© 2016 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Grazing angle FTIR spectrograms of Au/MPS (A) and Au/MPS/PAMAM G4.0-Au (B). While in A only non-specific peaks appeared which could not be attributed to the MPS molecule functional groups like S-H or C-S (A), Intense absorption bends could be observed from the amine stretching vibration at 3399 which is a cumulative one from primary surface and tertiary amines and amides. Also, absorption could be observed for amine bending vibrations at 1667 and 1599 which is in good agreement to literature data and enough for identification of the compound.