Nanoscale mapping of refractive index by using scattering-type Scanning Near-Field Optical Microscopy D.E. Tranca, S.G. Stanciu, R. Hristu, B.M. Witgen, George A. Stan- ciu PII: S1549-9634(17)30163-6 DOI: doi: 10.1016/j.nano.2017.08.016 Reference: NANO 1654 To appear in: Nanomedicine: Nanotechnology, Biology, and Medicine Received date: 5 January 2017 Revised date: 19 June 2017 Accepted date: 24 August 2017 Please cite this article as: Tranca DE, Stanciu SG, Hristu R, Witgen BM, Stanciu George A., Nanoscale mapping of refractive index by using scattering-type Scanning Near-Field Optical Microscopy, Nanomedicine: Nanotechnology, Biology, and Medicine (2017), doi: 10.1016/j.nano.2017.08.016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.