Highly selective and sensitive glucose sensors based on organic electrochemical transistors using TiO2 nanotube arrays-based gate electrodes

Liao, Jianjun; Lin, Shiwei; Yang, Yue; Li, Kai; Du, Wencai

doi:10.1016/j.snb.2014.11.038

Cited by 72 publications

(45 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the low-cost fabrication, chemical stability, high specific surface area, excellent electron transfer behavior, large numbers of active reaction sites for chemical reactions, photosensitivity, and catalytic potential of TNAs make them valuable for nanotechnology applications that go from solar cells to biological sensors [1,3,4]. In that regard, CdS-decorated TNAs have been investigated in quantum dot (QD)-sensitized solar cells [1,[5][6][7], photoelectrochemical hydrogen production [8], and photocatalytic and photoelectrocatalytic degradation of contaminants in water [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Improving the contact properties of CdS-decorated TiO2 nanotube arrays using an electrochemical/thermal/chemical approach

Carrera-Crespo

Rincón

González

et al. 2016

J Solid State Electrochem

View full text Add to dashboard Cite

Decoration of TiO 2 nanotube films (TiO 2 nanotube arrays (TNAs)) with CdS nanoparticles has been pursued for a broad range of applications that goes from solar cells to biological sensors. In most synthesis methods, the scale-up of devices has been challenging due to the poor contact at the chalcogenide/oxide interface. In this work, we validate the electrochemical/thermal/chemical route as a superior strategy to sensitize TNAs with CdS nanoparticles when compared with conventional methods. The process consisted of (i) electrodeposition of cadmium on TNAs to ensure strong bonding between TiO 2 and Cd precursor particles, (ii) air annealing of Cd-decorated TNAs to thermally oxidize cadmium to cadmium oxide, and (iii) total sulfurization of cadmium oxide to obtain CdS in an hexagonal phase matching that of TNAs. X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) analyses indicated the complete transformation of cadmium precursor particles into CdS and a good surface coverage of the internal/ external walls of TNAs. When compared to samples prepared by successive ionic layer adsorption and reaction (SILAR), electrochemical impedance spectroscopy data revealed the improvement of the electrical properties of the TNA matrix due to the sulfurization process and a lower contact resistance at the CdS/TNA interface. These improvements explain the superior photoelectrochemical response of CdS/TNA photoelectrodes obtained by the electrochemical/thermal/ chemical route.

show abstract

Section: Introductionmentioning

confidence: 99%

Improving the contact properties of CdS-decorated TiO2 nanotube arrays using an electrochemical/thermal/chemical approach

Carrera-Crespo

Rincón

González

et al. 2016

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

“…[19][20][21][22][23] For instance, TiO 2 nanotube arrays with specific diameters and lengths have been confirmed to improve the biological functioning of osteoblasts. 20 In addition, TiO 2 nanotube arrays have been demonstrated as a promising supporting electrode material in the construction of electrochemical glucose biosensors for medical and clinical applications.…”

Section: Introductionmentioning

confidence: 99%

“…20 In addition, TiO 2 nanotube arrays have been demonstrated as a promising supporting electrode material in the construction of electrochemical glucose biosensors for medical and clinical applications. 22,23 Previous studies have reported that the TiO 2 nanotube array coating can regulate cellular adhesion structures, 19,20 cell proliferation rates, and cell differentiation behavior. 21 In particular, changing the nanotube diameter can affect cell behavior.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale TiO2 nanotubes govern the biological behavior of human glioma and osteosarcoma cells

Tian¹,

Qin²,

Wu³

et al. 2015

IJN

View full text Add to dashboard Cite

Cells respond to their surroundings through an interactive adhesion process that has direct effects on cell proliferation and migration. This research was designed to investigate the effects of TiO 2 nanotubes with different topographies and structures on the biological behavior of cultured cells. The results demonstrated that the nanotube diameter, rather than the crystalline structure of the coatings, was a major factor for the biological behavior of the cultured cells. The optimal diameter of the nanotubes was 20 nm for cell adhesion, migration, and proliferation in both glioma and osteosarcoma cells. The expression levels of vitronectin and phosphor-focal adhesion kinase were affected by the nanotube diameter; therefore, it is proposed that the responses of vitronectin and phosphor-focal adhesion kinase to the nanotube could modulate cell fate. In addition, the geometry and size of the nanotube coating could regulate the degree of expression of acetylated α-tubulin, thus indirectly modulating cell migration behavior. Moreover, the expression levels of apoptosis-associated proteins were influenced by the topography. In conclusion, a nanotube diameter of 20 nm was the critical threshold that upregulated the expression level of Bcl-2 and obviously decreased the expression levels of Bax and caspase-3. This information will be useful for future biomedical and clinical applications.

show abstract

“…However, the major challenge in the fabrication of electrochemical glucose sensors is the immobilization of the model enzyme, glucose oxidase (Gox), on the electrode surface through effective electrical communication between GOx and the transducer, without compromising the mechanical stability and catalytic activity of the enzyme [3]. To overcome these issues, diverse methods and materials have been developed for the surface modification of electrodes [5,6].…”

Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles deposited on graphene and its electrochemical performance for glucose sensing

Mijowska

Onyszko

Urbas

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Highly selective and sensitive glucose sensors based on organic electrochemical transistors using TiO2 nanotube arrays-based gate electrodes

Cited by 72 publications

References 35 publications

Improving the contact properties of CdS-decorated TiO2 nanotube arrays using an electrochemical/thermal/chemical approach

Improving the contact properties of CdS-decorated TiO2 nanotube arrays using an electrochemical/thermal/chemical approach

Nanoscale TiO2 nanotubes govern the biological behavior of human glioma and osteosarcoma cells

Palladium nanoparticles deposited on graphene and its electrochemical performance for glucose sensing

Contact Info

Product

Resources

About