Graphene and other 2D materials are nowadays attracting more and more scientists from both academia and industry for their various advantages with interest for several applications. Among graphene forms graphene oxide (GO) and graphene quantum dots (GQDs) display advantageous characteristics with interest for building innovative biosensing platforms and even smart devices such as nano/micromotors for a myriad of uses including sensing. This is due to their excellent capabilities ranging from easy linking to (bio)chemical/synthetic receptors to unprecedented electronic and optical properties. Quenching of the fluorescence induced by GO or photoluminescence of GQDs can easily operate in synergy with various other nanomaterials and platforms opening the way to several unprecedented biosensing strategies and unique nanomotor technologies. The rationale behind the use of GO and GQDs in several optical and electrochemical biosensing technologies as well as in building smart devices such as nano/micromotors will be explained. Taking advantage of graphene materials we are developing simple, sensitive, selective and rapid biosensing platforms and other devices with interest for various diagnostics applications. The various examples will include: a) use of graphene as novel platform in quantum dots – based microarray & laterals flow technologies taking advantages of high quenching efficiency of GO. A “turn ON by a pathogen” device will be shown as a highly sensitive detection system using plastics or paper/nanopaper substrates; b) design and application of GQDs–based sensors for contaminants detection based on the use of multifunctional composite materials that enable rapid, simple and sensitive platforms in connection to smartphone; c) A water activated graphene oxide transfer technology using wax printed membranes for fast patterning of a touch sensitive device with interest for electronic devices including sensing as well as for a cost-efficient nanomotor building technology for several applications.

Acknowledgements. We acknowledge support from EU (Graphene Flagship) and MINECO (Spain) MAT2017-87202-P. This work is also funded by the CERCA Programme / Generalitat de Catalunya. ICN2 is supported by the Severo Ochoa program from Spanish MINECO (Grant No. SEV-2013-0295).

References.

1) E. Morales-Narváez, A.Merkoçi, Advanced Materials, 2012, 24, 3298; 2) L. Baptista Pires, C. C. Mayorga-Martínez, M.Medina Sanchez, H.Monton, A.Merkoçi, ACS Nano 2016, 10, 853; 3) E. Morales-Narváez, L. Florio Sgobbi, S. Antonio Spinola Machado, A.Merkoçi, Progress in Materials Science, 2017, 86, 1.; 4. Álvarez-Diduk, J. Orozco, A. Merkoçi, Scientific Reports, 2017, 7, 976; 5.E. Morales-Narváez, L. Baptista-Pires, A. Zamora-Gálvez, A. Merkoçi, Advanced Materials, 2017, 29, 1604905; 6) L. Baptista-Pires, J. Orozco, P.Guardia, A.Merkoçi, Small, 2017, DOI: 10.1002/smll.201702746

Graphene and other 2D materials are nowadays attracting more and more scientists from both academia and industry for their various advantages with interest for several applications. Among graphene forms graphene oxide (GO) and graphene quantum dots (GQDs) display advantageous characteristics with interest for building innovative biosensing platforms and even smart devices such as nano/micromotors for a myriad of uses including sensing. This is due to their excellent capabilities ranging from easy linking to (bio)chemical/synthetic receptors to unprecedented electronic and optical properties. Quenching of the fluorescence induced by GO or photoluminescence of GQDs can easily operate in synergy with various other nanomaterials and platforms opening the way to several unprecedented biosensing strategies and unique nanomotor technologies. The rationale behind the use of GO and GQDs in several optical and electrochemical biosensing technologies as well as in building smart devices such as nano/micromotors will be explained. Taking advantage of graphene materials we are developing simple, sensitive, selective and rapid biosensing platforms and other devices with interest for various diagnostics applications. The various examples will include: a) use of graphene as novel platform in quantum dots – based microarray & laterals flow technologies taking advantages of high quenching efficiency of GO. A “turn ON by a pathogen” device will be shown as a highly sensitive detection system using plastics or paper/nanopaper substrates; b) design and application of GQDs–based sensors for contaminants detection based on the use of multifunctional composite materials that enable rapid, simple and sensitive platforms in connection to smartphone; c) A water activated graphene oxide transfer technology using wax printed membranes for fast patterning of a touch sensitive device with interest for electronic devices including sensing as well as for a cost-efficient nanomotor building technology for several applications.

Acknowledgements. We acknowledge support from EU (Graphene Flagship) and MINECO (Spain) MAT2017-87202-P. This work is also funded by the CERCA Programme / Generalitat de Catalunya. ICN2 is supported by the Severo Ochoa program from Spanish MINECO (Grant No. SEV-2013-0295).

References.

1) E. Morales-Narváez, A.Merkoçi, Advanced Materials, 2012, 24, 3298; 2) L. Baptista Pires, C. C. Mayorga-Martínez, M.Medina Sanchez, H.Monton, A.Merkoçi, ACS Nano 2016, 10, 853; 3) E. Morales-Narváez, L. Florio Sgobbi, S. Antonio Spinola Machado, A.Merkoçi, Progress in Materials Science, 2017, 86, 1.; 4. Álvarez-Diduk, J. Orozco, A. Merkoçi, Scientific Reports, 2017, 7, 976; 5.E. Morales-Narváez, L. Baptista-Pires, A. Zamora-Gálvez, A. Merkoçi, Advanced Materials, 2017, 29, 1604905; 6) L. Baptista-Pires, J. Orozco, P.Guardia, A.Merkoçi, Small, 2017, DOI: 10.1002/smll.201702746