title: Self-cleaning properties in engineered sensors for dopamine electroanalytical detection.
abstract: Fouling and passivation are the major drawbacks for a wide applicability of electroanalytical sensors based on nanomaterials, especially in biomedical and environmental fields. The production of highly engineered devices, designed ad hoc for specific applications, is the key factor in the direction of overcoming the problem and accessing effective sensors. Here, the fine-tuning of the system, composed of a highly ordered distribution of silver nanoparticles between a bottom silica and a top titania layer, confers multifunctional properties to the device for a biomedical complex challenge: dopamine detection. The crucial importance of each component towards a robust and efficient electroanalytical system is studied. The total recovery of the electrode performance after a simple UV-A cleaning step (self-cleaning), due to the photoactive interface and the aging resistance, is deeply investigated.
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. luigi.falciola@unimi.it.
authors.forename: Guido
authors.initials: G
authors.lastname: Soliveri
authors.forename: Valentina
authors.initials: V
authors.lastname: Pifferi
authors.forename: Guido
authors.initials: G
authors.lastname: Panzarasa
authors.forename: Silvia
authors.initials: S
authors.lastname: Ardizzone
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Cappelletti
authors.forename: Daniela
authors.initials: D
authors.lastname: Meroni
authors.forename: Katia
authors.initials: K
authors.lastname: Sparnacci
authors.forename: Luigi
authors.initials: L
authors.lastname: Falciola
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D004298:Dopamine / Q000032:analysis*; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation*; D012834:Silver / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: C009495:titanium dioxide; D012834:Silver; D014025:Titanium; D004298:Dopamine