Accepted Manuscript A probeless and label-free electrochemical immunosensor for cystatin C detection based on ferrocene functionalized-graphene platform Erika K.G. Trindade, Bárbara V.M. Silva, Rosa F. Dutra PII: S0956-5663(19)30376-8 DOI: https://doi.org/10.1016/j.bios.2019.05.016 Reference: BIOS 11311 To appear in: Biosensors and Bioelectronics Received Date: 1 February 2019 Revised Date: 23 April 2019 Accepted Date: 6 May 2019 Please cite this article as: Trindade, E.K.G., Silva, Bá.V.M., Dutra, R.F., A probeless and label-free electrochemical immunosensor for cystatin C detection based on ferrocene functionalized-graphene platform, Biosensors and Bioelectronics (2019), doi: https://doi.org/10.1016/j.bios.2019.05.016. 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.