Accepted Manuscript Full Length Article Fabrication of Ordered Tubular Porous Silicon Structures by Colloidal Lithog- raphy and Metal Assisted Chemical Etching: SERS performance of 2D Porous Silicon Structures R.F. Balderas-Valadez, J.O. Estévez-Espinoza, U. Salazar-Kuri, C. Pacholski, W.L. Mochan, V. Agarwal PII: S0169-4332(18)32257-8 DOI: https://doi.org/10.1016/j.apsusc.2018.08.120 Reference: APSUSC 40157 To appear in: Applied Surface Science Received Date: 7 July 2018 Revised Date: 7 August 2018 Accepted Date: 16 August 2018 Please cite this article as: R.F. Balderas-Valadez, J.O. Estévez-Espinoza, U. Salazar-Kuri, C. Pacholski, W.L. Mochan, V. Agarwal, Fabrication of Ordered Tubular Porous Silicon Structures by Colloidal Lithography and Metal Assisted Chemical Etching: SERS performance of 2D Porous Silicon Structures, Applied Surface Science (2018), doi: https://doi.org/10.1016/j.apsusc.2018.08.120 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.