Crown ether assembly of gold nanoparticles: Melamine sensor

Kuang, Hua; Chen, Wei; Yan, Wenjing; Xu, Liguang; Zhu, Yuntian; Liu, Liqiang; Chu, Hsin‐Sen; Peng, Chifang; Wang, Libing; Kotov, Nicholas A.; Xu, Chuanlai

doi:10.1016/j.bios.2010.08.081

Cited by 126 publications

(58 citation statements)

References 42 publications

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“…For example, triple hydrogen-bonding recognition between melamine and a cyanuric acid derivative grafted on the surface of Au NPs has been used for reliable detection of melamine (Ai et al, 2009). Colorimetric sensing methods of melamine have been developed based on the aggregation of crown ether-modified Au NPs through the formation of cavity complexes with amines (Kuang et al, 2011). Melamine in milk products could be detected by visual and light scattering spectrometric methods with polythymine-stabilized Au NPs on the basis of the formation of triple H-bonds between thymine and melamine in aqueous solution (Qi, Wu, Ling, & Huang, 2010).…”

Section: Introductionmentioning

confidence: 99%

Visual detection of melamine in raw milk by label-free silver nanoparticles

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Visual detection of melamine in raw milk by label-free silver nanoparticles

et al. 2012

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“…28, 29 Rotello et al have used AuNPs as host scaffolds to encapsulate hydrophobic guest molecules into the engineered monolayer. 30 In addition to encapsulation, proper surface functionalization of AuNPs provides recognition by macrocyclic compound such as crown ethers, 31, 32 calixarenes, 33, 34 cyclodextrins, 35, 36 pillararenes 37 and cucurbiturils. 38–40 …”

mentioning

confidence: 99%

Binding studies of cucurbit[7]uril with gold nanoparticles bearing different surface functionalities

Tonga

Mizuhara

Saha

et al. 2015

Tetrahedron Letters

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Host-guest interactions between a synthetic receptor, cucurbit[7]uril (CB[7]), and gold nanoparticles (AuNPs) have been quantified using isothermal titration calorimetry. AuNPs were functionalized with ligands containing tertiary or quaternary benzylamine derivatives, with electron donating or withdrawing groups at the para position of the benzene ring. Analysis of binding interactions reveals that functional groups at the para position have no significant effect on binding constant. However, headgroups bearing a permanent positive charge increased the binding of AuNPs to CB[7] ten-fold compared to monomethyl counterparts.

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“…The authors claim that this nanosensor can be used to precisely measure the melamine content in infant formula and raw milk at concentrations of 2.5 ppb with no more than the naked eye (Ai et al 2009). Other approaches to the detection of melamine with gold nanoparticles with different modifications have been described by Cao et al (2010) and Kuang et al (2011) with slightly higher detection limits.…”

Section: Detection Of Other Organic Moleculesmentioning

confidence: 99%

Nano-developments for Food Packaging and Labeling Applications

Echegoyen

2015

Nanotechnologies in Food and Agriculture

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Nanotechnology is defined as the study and use of structures between 1 and 100 nm in length (at least in one dimension). Due to the different properties of nanosized materials compared to the bulk material, research in nanotechnology has increased exponentially in recent years. The food sector is no exception, and nanotechnology is present in different stages of the food chain, from agriculture to food processing, supplements, or food packaging. Among them, the most active area of food nanoscience research and development is food packaging.Nanomaterials are used in packaging to improve the packaging barrier properties, to create active or intelligent packaging materials, or to enhance the properties of edible and biodegradable packaging materials. In addition to the packages itself, nanotechnology can also be used in labeling applications, like a nano-barcode. In the present chapter, all these applications and the commercialized products already in the market will be discussed.The current legislation related to nano-developments in food packaging is at different stages in different countries, and there are concerns about the safety of the use of such nanosized materials for food packaging applications. The different studies concerning the possible migration of the nanomaterials used in the packaging to the food will be reviewed.

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Crown ether assembly of gold nanoparticles: Melamine sensor

Cited by 126 publications

References 42 publications

Visual detection of melamine in raw milk by label-free silver nanoparticles

Visual detection of melamine in raw milk by label-free silver nanoparticles

Binding studies of cucurbit[7]uril with gold nanoparticles bearing different surface functionalities

Nano-developments for Food Packaging and Labeling Applications

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