Novel potentiometric approach in glucose biosensor using silver nanoparticles as redox marker

Ngeontae, Wittaya; Janrungroatsakul, Wanwisa; Maneewattanapinyo, Pattwat; Ekgasit, Sanong; Aeungmaitrepirom, Wanlapa; Tuntulani, Thawatchai

doi:10.1016/j.snb.2008.11.003

Cited by 68 publications

(30 citation statements)

References 24 publications

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“…High concentration of colloidal AgNPs solution was synthesized via chemical reduction process according to the method previously described with same minor modifications [14,23]. Briefly, a 0.094 M aqueous solution of silver nitrate (AgNO 3 ; Merck) was prepared with soluble starch (Merck) as a stabilizer.…”

Section: Preparation and Characterization Of Agnpsmentioning

confidence: 99%

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

et al. 2011

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ABSTRACT. Tests for acute oral toxicity, eye irritation, corrosion and dermal toxicity of colloidal silver nanoparticles (AgNPs) were conducted in laboratory animals following OECD guidelines. Oral administration of AgNPs at a limited dose of 5,000 mg/kg produced neither mortality nor acute toxic signs throughout the observation period. Percentage of body weight gain of the mice showed no significant difference between control and treatment groups. In the hematological analysis, there was no significant difference between mice treated with AgNPs and controls. Blood chemistry analysis also showed no differences in any of the parameter examined. There was neither any gross lesion nor histopathological change observed in various organs. The results indicated that the LD 50 of colloidal AgNPs is greater than 5,000 mg/kg body weight. In acute eye irritation and corrosion study, no mortality and toxic signs were observed when various doses of colloidal AgNPs were instilled in guinea pig eyes during 72 hr observation period. However, the instillation of AgNPs at 5,000 ppm produced transient eye irritation during early 24 hr observation time. No any gross abnormality was noted in the skins of the guinea pigs exposed to various doses of colloidal AgNPs. In addition, no significant AgNPs exposure relating to dermal tissue changes was observed microscopically. In summary, these findings of all toxicity tests in this study suggest that colloidal AgNPs could be relatively safe when administered to oral, eye and skin of the animal models for short periods of time.KEY WORDS: acute toxicity, colloidal silver nanoparticles, dermal, eye, oral.J. Vet. Med. Sci. 73(11): 1417-1423, 2011 Engineered nanoparticles (NP) are defined as materials produced within the nanoscale range of 1-100 nm in length or diameter that exhibit unique novel properties of the structural integrity as well as physical and chemical properties [26]. Over the past few decades, nanomaterials have had a great impact and gained enormous attention in science, technology and business because of their potential for achieving specific processes and selectivity. Although the applications and benefits of these engineered nanomaterials are extensively and currently being widely used in modern technology and many commercial and medical sectors, there is still limited information concerning human health and environmental impacts. Several studies expected that nanoparticles could lead to unexpected health or environmental hazards because of their unique properties such as extremely high surface area and increased reactivity [7].Silver nanoparticles (AgNPs), one of the most commonly used metal-nanoparticles, have been known to have a wide range of applications including solar energy absorption coatings, chemical catalysts and especially antimicrobial agents. AgNPs have potentials for inhibitory and bactericidal effects as well as retarding the growth of mold, harmful spores and germs [5]. Compared to bulk silver metal, AgNPs are expected to have higher antimicrobial activity...

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Section: Preparation and Characterization Of Agnpsmentioning

confidence: 99%

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

et al. 2011

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“…[39][40][41] However, there are some limitations for the application of silver NPs due to the poor stability and narrow potential window. Thus, core-shell structure is a relatively e±cient way in changing the surface properties of the NPs.…”

Section: Soft Templatementioning

confidence: 99%

Polydopamine used as Hollow Capsule and Core–Shell Structures for Multiple Applications

Cui

Yin

et al. 2015

NANO

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Polydopamine (PDA) capsule and core-shell structures with tailored structures and properties are of particular interests due to their multifunctions and potential applications as new colloidal structures in diverse¯elds. Among the available fabrication methods, PDA¯lm onto colloidal particles followed by selective template removal has attracted extensive attention due to its advantages of precise control over the size, wall thickness and functions of the obtained capsules. The past several years has witnessed a rapid increase of research concerning the new fabrication strategies, functionalization and applications of this kind of capsules and core-shell structures, particularly in many¯elds such as drug delivery, catalysis, antibacterial, etc. In this review, the very recent progress of the capsule and core-shell structures based on PDA are summarized. There are basically two sections, including the fabrication process of PDA capsules, core-shell structures, and the various applications based on PDA.

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“…Also, a potentiometric immunoassay based on CdSe QDs as labels was developed by Pretsch and co-workers [68] and the LOD of <10 fmol IgG in 150-lL sample solution was obtained. Silver NPs (AgNPs) were also used as a potentiometric redox marker to develop a potentiometric glucose biosensor [69]. The product, H 2 O 2 , generated by the enzyme-substrate reaction between glucose and glucose oxidase, is used to oxidize AgNPs to free Ag + ions, which are related to the concentration of glucose and can be detected by an Ag + -ISE.…”

Section: Release Of Metal Ions By Nanoparticle Dissolutionmentioning

confidence: 99%

Applications of nanomaterials in potentiometric sensors

Yin

Qin

2013

TrAC Trends in Analytical Chemistry

182

104

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Keywords:Aptasensor Biosensor Carbon-based nanomaterial Chemosensor Ionophore Ion-selective electrode Ion-selective microelectrode Nanomaterial Neutral species Potentiometric sensor a b s t r a c t Nanomaterials play an important role in the fabrication of chemosensors and biosensors, due to their unique physical and chemical properties, such as large surface area/volume ratio, good conductivity, excellent electrocatalytic activity and high mechanical strength. We review recent advances in the applications of these nanomaterials in potentiometric sensors. We highlight the development of stable solidstate polymeric membrane ion-selective electrodes (ISEs). We describe ISEs based on ionophore-modified nanomaterials. Also, we present highly-sensitive potentiometric biosensors based on nanomaterials.

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Novel potentiometric approach in glucose biosensor using silver nanoparticles as redox marker

Cited by 68 publications

References 24 publications

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

Polydopamine used as Hollow Capsule and Core–Shell Structures for Multiple Applications

Applications of nanomaterials in potentiometric sensors

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