In 2013 he got Italian Full Professorship habilitation as excellent in Condensed Matter Physics 02/B1. He is involved in the study of preparation of metal oxide semiconductors MOX as thin films and quasi monodimensional nanostructures for gas sensing, energy (solar cells, thermoelectrics), opto-electronic applications (LEDs) and nanomedicine. He has been involved in European Commission Projects since 1992 (Project ESPRIT No. 6374) in basic and applied physics research on semiconductors and their application in an interdisciplinary field as biochemical sensing. He has a relevant working experience with many international institutions like EC, NATO, European Space Agency ESA, INTAS. He has coordinated (2012-2015) the project WIROX in the frame of FP7-PEOPLE-2011-IRSES.
During his career Guido Faglia has published 217 (authored) articles on International Journals with referee . His Hirsch factor is 47 on Scopus and 48 on WOS (Dec 2018); His Valutazione Qualità della Ricerca VQR 2004-2010 mean value is 0.98 on eleven considered products, while the VQR 2011-2014 is 0.92 on four products. He is referee of many international journals among which Advanced Materials, Angewandte Chemie, Small, Applied Physics Letters, Advanced Functional Materials, Scientific Reports, ACS Sensors and Sensors and Actuators B. He was co-editor of one book, co-authored seven chapters in books and filed three patents.