Macroporous ordered titanium dioxide (TiO2) inverse opal as a new label-free immunosensor

Li, Jianlin; Zhao, Xiangwei; Wang, Hongmei; Gu, Zhongze; Zhang, Lu

doi:10.1016/j.aca.2008.07.008

Cited by 53 publications

(38 citation statements)

References 39 publications

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“…Such ICTP devices are also useful to synthesize nanoparticles of various kinds [8]- [15]. Titanium dioxide (TiO 2 ) nanoparticles are continually receiving attention for use as photocatalysts [16], photonic crystals [17], photovoltaic cells [18], and gas sensors [19]. They are also anticipated for use as strong deoxidation materials to produce hydrogen gas from water for fuel cells [20].…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle synthesis using high-powered pulse-modulated induction thermal plasma

Tanaka¹,

Nagumo²,

Sakai³

et al. 2010

J. Phys. D: Appl. Phys.

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Abstract. Nanoparticle synthesis was performed using high-powered pulsemodulated induction thermal plasma (PMITP) technique to study the effect of coil current modulation on synthesized nanoparticles. This is the first paper to present a summary of results of TiO 2 nanoparticle synthesis using high-power Ar-O 2 PMITP at 20 kW. The synthesized particles were analyzed using a field emission scanning electron microscope (FE-SEM), and X-ray diffractometry (XRD). In addition, optical emission spectroscopy (OES) was used during nanoparticle synthesis experiments to measure TiO spectra and to determine the time-averaged vibrational and rotational temperatures of TiO in the reaction chamber. Results showed that the PMITP produced smaller nanoparticles and a narrower size distribution of particles. Moreover, PMITP provided a lower-temperature region in the reaction chamber downstream of the plasma torch than such regions in non-modulated thermal plasmas.

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Section: Introductionmentioning

confidence: 99%

Nanoparticle synthesis using high-powered pulse-modulated induction thermal plasma

Tanaka¹,

Nagumo²,

Sakai³

et al. 2010

J. Phys. D: Appl. Phys.

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“…Titanium dioxide (TiO 2 ) nanopowder is continually receiving attention for use as photocatalysts [1], photonic crystals [2], photovoltaic cells [3], and gas sensors [4]. It is also anticipated for use as a strong deoxidation material used for producing hydrogen gas from water for fuel cells [5].…”

Section: Introductionmentioning

confidence: 99%

A method for large-scale synthesis of Al-doped TiO₂nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Kodama¹,

Tanaka²,

Kita³

et al. 2014

J. Phys. D: Appl. Phys.

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Abstract.A unique large-scale synthesis method for Al-doped TiO 2 nanopowder was developed using 20-kW Ar-O 2 pulse-modulated induction thermal plasmas (PMITP) with time-controlled feedstock feeding (TCFF). This PMITP-TCFF method is characterized by intermittent feedstock powder feeding synchronized with modulated power of the PMITP. The method enables heavy-load feeding of raw material powder to the thermal plasmas for complete evaporation. Synthesized nanopowder was analyzed using different methods including FE-SEM, XRD, BF-TEM, TEM/EDX mapping, XPS, and spectrophotometry. Results showed that Al-doped TiO 2 nanopowder can be synthesized with mean diameters of 50-60 nm. The Al doping in TiO 2 was confirmed from the constituent structure in XRD spectra, the uniform presence of Al on the nanopowder in TEM/EDX mapping, the chemical shift in XPS spectra, and the absorption edge shift in the optical property. The production rate of Al-doped TiO 2 nanopowder was estimated as 400 g h −1 .

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“…[1][2][3][4] Additionally, scattering effects in the high refractive index macroporous titania scaffolds can increase the light harvesting efficiency of photovoltaic devices, and in the case of ordered arrays photonic effects can be exploited. Due to these features, macroporous titania is a very attractive system for chemical sensing of molecules, 5,6 electrochemical lithium insertion, 7,8 photocatalytic decomposition of organic compounds, [9][10][11][12][13] and photoanodes in non-silicon solar cells, respectively. [14][15][16][17][18][19][20][21][22][23] In these applications, the performance is oen controlled by the crystallinity and morphology of the porous titania systems.…”

Section: Introductionmentioning

confidence: 99%

Tuning the crystallinity parameters in macroporous titania films

et al. 2014

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Although macroporous titania scaffolds are used for many different applications, not much is known about the importance of the synthesis strategy on the resulting materials' properties. We present a comparative study on the influence of different colloidal titania precursors for direct co-deposition with poly(methyl methacrylate) (PMMA) beads on the properties of the resulting macroporous scaffolds after calcination.The colloidal titania precursors for the film assembly differ in their size and initial crystallinity, ranging from amorphous sol-gel clusters to already crystalline pre-formed particles of 4 nm, 6 nm and 20 nm in size, as well as a combination of sol-gel and nanoparticle precursors in the so-called 'Brick and Mortar' approach. The type of the precursor greatly influences the morphology, texture and the specific crystallinity parameters of the macroporous titania scaffolds after calcination such as the size of the crystalline domains, packing density of the crystallites in the macroporous walls and interconnectivity between the crystals. Moreover, the texture and the crystallinity of the films can be tuned by postsynthesis processing of the films such as calcination at different temperatures, which can be also preceded by a hydrothermal treatment. The ability to adjust the porosity, the total surface area and the crystallinity parameters of the crystalline macroporous films by selecting suitable precursors and by applying different post-synthetic treatments provides useful tools to optimize the film properties for different applications.

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Macroporous ordered titanium dioxide (TiO2) inverse opal as a new label-free immunosensor

Cited by 53 publications

References 39 publications

Nanoparticle synthesis using high-powered pulse-modulated induction thermal plasma

Nanoparticle synthesis using high-powered pulse-modulated induction thermal plasma

A method for large-scale synthesis of Al-doped TiO₂nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Tuning the crystallinity parameters in macroporous titania films

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Macroporous ordered titanium dioxide (TiO2) inverse opal as a new label-free immunosensor

Cited by 53 publications

References 39 publications

Nanoparticle synthesis using high-powered pulse-modulated induction thermal plasma

Nanoparticle synthesis using high-powered pulse-modulated induction thermal plasma

A method for large-scale synthesis of Al-doped TiO2nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Tuning the crystallinity parameters in macroporous titania films

Contact Info

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A method for large-scale synthesis of Al-doped TiO₂nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding