Josué David Hernández-Varela has been doing Postdoctoral research at the Instituto Politécnico Nacional (Mexico) since October 2023. He was a Postdoctoral researcher at the Universidad Iberoamericana Departamento de Física y Matemáticas in 2022 (Mexico). Also, He worked as an assistant researcher at Tecnologico de Monterrey from 2022 to 2023 (Mexico). He received a Degree in Chemistry at the Universidad del Zulia (Venezuela) from 2007 to 2013, a Master's in Nanoscience Materials and Process at the Universitat Rovira i Virgili (Spain) from 2014 to 2015, and a Ph.D. in Nanoscience and micro nanotech at the Instituto Politécnico Nacional from 2017 to 2021. Research keywords and expertise include cellulose, chemical composition, polymer & natural biopolymers, microstructure analysis of materials, and microstructure–mechanical properties relationships in polymer-based materials. Also, He has strong knowledge of spectroscopy and analysis of samples and expertise in electrode and sensor development for potentiometric and potentiostats analysis.