Synthesis and characterization of nanosize sodium titanates

Elvington, Mark C.; Tosten, M.H.; Taylor-Pashow, K.; Hobbs, D.T.

doi:10.1007/s11051-012-1114-z

Cited by 6 publications

(5 citation statements)

References 31 publications

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“…[14,15,21] HAuCl 4i• 3H 2 O was combined with a suspension of MST, nMST or APT for Au ion exchanger experiment to get MST-Au(III), nMST-Au(III) and APT-Au(III). Titanate and gold-titanate materials were prepared and sent to University of Washington from Dr. David Hobbs group (Savannah River National Laboratory, Aiken, SC).…”

Section: Methodsmentioning

confidence: 99%

“…Micro-sized and nano-sized of monosodium titanate (MST and nMST) and amorphous peroxotitanate (APT) were prepared using a sol–gel or hydrothermal synthetic techniques as described in previous studies. [ 14 , 15 , 21 ] HAuCl 4i• 3H 2 O was combined with a suspension of MST, nMST or APT for Au ion exchanger experiment to get MST-Au(III), nMST-Au(III) and APT-Au(III). Titanate and gold-titanate materials were prepared and sent to University of Washington from Dr. David Hobbs group (Savannah River National Laboratory, Aiken, SC).…”

Section: Methodsmentioning

confidence: 99%

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Antibacterial activity of gold-titanates on Gram-positive cariogenic bacteria

Eiampongpaiboon

Chung

Bryers

et al. 2015

Acta Biomaterialia Odontologica Scandinavica

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Objective: Gram-positive cariogenic bacteria are etiological agents in dental caries; therefore, strategies to inhibit these bacteria to reduce the incident of this disease have intensified. In this study, we investigated antibacterial activities of titanates and gold-titanates against Lactobacillus casei (Lc) and Streptococcus mutans (Sm). Materials and methods: Monosodium titanate (MST), nanomonosodium titanate (nMST) and amorphous peroxo-titanate (APT), which are inorganic compounds with high-binding affinity for specific metal ions, were used. Total bacterial proteins were measured to represent bacterial cell mass after 24 h incubation with gold-titanates. We further examined the effect of nMST-Au(III) concentrations (10,200,400 mg/L) on Lc and Sm cell viability over time via Live/Dead fluorescent staining and colony forming units (CFUs). Transmission electron microscopy (TEM) was used to determine specific locations on the bacterial cells affected by the nMST-Au(III). Results: We found all gold-titanates and APT alone reduced bacterial protein for Lc (p value <0.001) while only MST-Au(III) and nMST-Au(III) affected Sm growth (p value <0.001). Overall, nMST-Au(III) showed the most effectiveness against both Lc and Sm at 400 mg/L. The Live/Dead staining showed all concentrations of nMST-Au(III) affected Lc growth but only 200 and 400 mg/L nMST-Au(III) interrupted Sm growth. The growth curves based on CFUs/mL showed all nMST-Au(III) concentrations affected growth of both Lc and Sm. TEM images showed nMST-Au(III) attached to Lc and Sm cell wall and were internalized into both cells. Conclusions: nMST-Au(III) demonstrated potential antimicrobial activity against Gram-positive cariogenic bacteria. These results support further development of nMST-Au(III) as a potential novel material to prevent dental caries.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Antibacterial activity of gold-titanates on Gram-positive cariogenic bacteria

Eiampongpaiboon

Chung

Bryers

et al. 2015

Acta Biomaterialia Odontologica Scandinavica

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“…All the peroxide-modified titanates were milky yellow in color, indicating that the titanium-peroxo species is protonated or associated with water protons [17]. Moreover, deeper yellow-orange slurries were observed for peroxide-modified titanate obtained at acidic conditions.…”

Section: The Characterization Of Peroxide-modified Titanate Materialsmentioning

confidence: 95%

Synthesis and metal ion sorption properties of peroxide-modified sodium titanate materials using a coprecipitation method

Yang¹,

Nam²,

Chung³

et al. 2015

Surface and Coatings Technology

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“…It is produced by a sol-gel process in which the temperature, reagent concentrations and addition rates are controlled (Figure 1) [2]. The addition of surfactants and more dilute reagent concentrations can produce smaller particles in the nanosize range that feature much higher surface areas [4]. These nanosize particles were developed with a hope of increasing the adsorptive capacity and rate for metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…These nanosize particles were developed with a hope of increasing the adsorptive capacity and rate for metal ions. Nanosize sodium titanates with tubular shapes having lengths of 100-200nm and diameters of <10nm have been also been synthesized [4]. The sodium titanate nanotubes (NaTONT) are prepared by a hydrothermal reaction with titanium dioxide (anatase) and sodium hydroxide.…”

Section: Introductionmentioning

confidence: 99%

Titanates and Titanate-Metal Compounds in Biological Contexts

et al. 2015

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Metal ions are notorious environmental contaminants, some causing toxicity at exquisitely low (ppm-level) concentrations. Yet, the redox properties of metal ions make them attractive candidates for bio-therapeutics. Titanates are insoluble particulate compounds of titanium and oxygen with crystalline surfaces that bind metal ions; these compounds offer a means to scavenge metal ions in environmental contexts or deliver them in therapeutic contexts while limiting systemic exposure and toxicity. In either application, the toxicological properties of titanates are crucial. To date, the accurate measurement of the in vitro toxicity of titanates has been complicated by their particulate nature, which interferes with many assays that are optical density (OD)-dependent, and at present, little to no in vivo titanate toxicity data exist. Compatibility data garnered thus far for native titanates in vitro are inconsistent and lacking in mechanistic understanding. These data suggest that native titanates have little toxicity toward several oral and skin bacteria species, but do suppress mammalian cell metabolism in a cells-pecific manner. Titanate compounds bind several types of metal ions, including some common environmental toxins, and enhance delivery to bacteria or cells. Substantial work remains to address the practical applicability of titanates. Nevertheless, titanates have promise to serve as novel vehicles for metal-based therapeutics or as a new class of metal scavengers for environmental applications.

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Synthesis and characterization of nanosize sodium titanates

Cited by 6 publications

References 31 publications

Antibacterial activity of gold-titanates on Gram-positive cariogenic bacteria

Antibacterial activity of gold-titanates on Gram-positive cariogenic bacteria

Synthesis and metal ion sorption properties of peroxide-modified sodium titanate materials using a coprecipitation method

Titanates and Titanate-Metal Compounds in Biological Contexts

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