Dendrimers/TiO2 nanoparticles layer-by-layer films as extended gate FET for pH detection

Vieira, Nirton Cristi Silva; Figueiredo, Antônio Domingues de; Faceto, Angelo Danilo; Queiroz, Álvaro Antônio Alencar de; Zucolotto, Valtencir; Guimarães, Francisco Eduardo Gontijo

doi:10.1016/j.snb.2012.01.003

Cited by 33 publications

(22 citation statements)

References 21 publications

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“…As a result, their bioelectrocatalysis and the biosensing functions were significantly influenced due to the electroactive mediator. For the same reason, the pH-switchable determination has appeared in a few previous reports [10,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 88%

Layer by layer assembled films between hemoglobin and multiwall carbon nanotubes for pH-switchable biosensing

Pan

Liu

Xie

et al. 2015

Colloids and Surfaces B: Biointerfaces

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Section: Introductionmentioning

confidence: 88%

Layer by layer assembled films between hemoglobin and multiwall carbon nanotubes for pH-switchable biosensing

Pan

Liu

Xie

et al. 2015

Colloids and Surfaces B: Biointerfaces

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“…The conductivity of the as‐synthesised anatase TiO 2 nanowires is lower than the TiO 2 film materials [33, 38, 39], but higher than other 1D oxide semiconductor materials [37, 40]. Generally, doping can effectively narrow the bandgap and increase carrier concentration.…”

Section: Resultsmentioning

confidence: 99%

Enhanced conductivity of anatase TiO ₂ nanowires by La and Co co‐doping

Yang

et al. 2020

Micro & Nano Letters

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In this work, the conductivity of anatase titanium dioxide (TiO 2) nanowires was enhanced by lanthanum (La) and cobalt (Co) co-doping method. The nanowires were synthesised via a facile solvothermal process. The diameter of as-synthesised nanowires is about 300 nm and length more than 20 μm. The electrical properties were studied based on single nanowire field-effect transistor; the anatase TiO 2 nanowires exhibit n-type conductivity with mobility of 2.18 cm 2 V −1 S −1 and carrier concentration of 1.95 × 10 18 cm −3. Doping of rare earth element La and transition element Co can not only reduce bandgap, but also reduce electron-hole recombination and improve carrier concentration. The distinct electrical properties of doped nanowires will open new opportunities for the application of anatase TiO 2 semiconductor materials in nanoelectronics devices.

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“…42 This versatility is indeed one of the major advantages of the LbL method, which may be used to coat any type of support of any shape, from solid plates to microparticles and nanoparticles. 43 Numerous materials in LbL films are used for biosensing, including carbon nanotubes (CNTs), 44 graphene sheets, 45 metal nanoparticles, 46 and biomolecules. 47 Of particular importance in this regard is the control of molecular architecture, as exemplified in the biosensor schematically shown in Figure 3.…”

Section: A Generic Architecture For Biosensorsmentioning

confidence: 99%

Nanomaterials for Diagnosis: Challenges and Applications in Smart Devices Based on Molecular Recognition

Oliveira

Iost

Siqueira

et al. 2014

ACS Appl. Mater. Interfaces

158

137

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Clinical diagnosis has always been dependent on the efficient immobilization of biomolecules in solid matrices with preserved activity, but significant developments have taken place in recent years with the increasing control of molecular architecture in organized films. Of particular importance is the synergy achieved with distinct materials such as nanoparticles, antibodies, enzymes, and other nanostructures, forming structures organized on the nanoscale. In this review, emphasis will be placed on nanomaterials for biosensing based on molecular recognition, where the recognition element may be an enzyme, DNA, RNA, catalytic antibody, aptamer, and labeled biomolecule. All of these elements may be assembled in nanostructured films, whose layer-by-layer nature is essential for combining different properties in the same device. Sensing can be done with a number of optical, electrical, and electrochemical methods, which may also rely on nanostructures for enhanced performance, as is the case of reporting nanoparticles in bioelectronics devices. The successful design of such devices requires investigation of interface properties of functionalized surfaces, for which a variety of experimental and theoretical methods have been used. Because diagnosis involves the acquisition of large amounts of data, statistical and computational methods are now in widespread use, and one may envisage an integrated expert system where information from different sources may be mined to generate the diagnostics.

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Dendrimers/TiO2 nanoparticles layer-by-layer films as extended gate FET for pH detection

Cited by 33 publications

References 21 publications

Layer by layer assembled films between hemoglobin and multiwall carbon nanotubes for pH-switchable biosensing

Layer by layer assembled films between hemoglobin and multiwall carbon nanotubes for pH-switchable biosensing

Enhanced conductivity of anatase TiO ₂ nanowires by La and Co co‐doping

Nanomaterials for Diagnosis: Challenges and Applications in Smart Devices Based on Molecular Recognition

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Dendrimers/TiO2 nanoparticles layer-by-layer films as extended gate FET for pH detection

Cited by 33 publications

References 21 publications

Layer by layer assembled films between hemoglobin and multiwall carbon nanotubes for pH-switchable biosensing

Layer by layer assembled films between hemoglobin and multiwall carbon nanotubes for pH-switchable biosensing

Enhanced conductivity of anatase TiO 2 nanowires by La and Co co‐doping

Nanomaterials for Diagnosis: Challenges and Applications in Smart Devices Based on Molecular Recognition

Contact Info

Product

Resources

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Enhanced conductivity of anatase TiO ₂ nanowires by La and Co co‐doping