Polyethyleneimine/Manganese‐Doped ZnS Nanocomposites: A Multifunctional Probe for Two‐Color Imaging and Three‐Dimensional Sensing

Sang, Ling; Wu, Yeyu; Wang, Hefang

doi:10.1002/cplu.201300049

Cited by 12 publications

(12 citation statements)

References 44 publications

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“…Multiwavelength luminescent and colorimetric reporter moieties were demonstrated to respond to different chemicals provided by several reporter units in a moiety. Such reporters were developed to exhibit absorbance, fluorescence, electroluminescence, and other changes in relation to detected chemicals. , Compounds for dual-, triple-, and quadruple-channel sensing of volatile and nonvolatile analytes have been demonstrated. − …”

Section: Multivariable Photonic Resonant Sensorsmentioning

confidence: 99%

Multivariable Sensors for Ubiquitous Monitoring of Gases in the Era of Internet of Things and Industrial Internet

2016

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Modern gas monitoring scenarios for medical diagnostics, environmental surveillance, industrial safety, and other applications demand new sensing capabilities. This Review provides analysis of development of new generation of gas sensors based on the multivariable response principles. Design criteria of these individual sensors involve a sensing material with multiresponse mechanisms to different gases and a multivariable transducer with independent outputs to recognize these different gas responses. These new sensors quantify individual components in mixtures, reject interferences, and offer more stable response over sensor arrays. Such performance is attractive when selectivity advantages of classic gas chromatography, ion mobility, and mass spectrometry instruments are canceled by requirements for no consumables, low power, low cost, and unobtrusive form factors for Internet of Things, Industrial Internet, and other applications. This Review is concluded with a perspective for future needs in fundamental and applied aspects of gas sensing and with the 2025 roadmap for ubiquitous gas monitoring.

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Section: Multivariable Photonic Resonant Sensorsmentioning

confidence: 99%

Multivariable Sensors for Ubiquitous Monitoring of Gases in the Era of Internet of Things and Industrial Internet

2016

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“…HyPEI contains abundant primary, secondary, and tertiary amine groups, and has a strong affinity towards the complexation of transition metals [54]. Consequently, HyPEI has been used in water treatment and as a support for nanoparticles [51,55]. In synthetic laboratories, HyPEI is prepared by ring-opening polymerization of aziridine (Scheme 3) in 1M aqueous HCl at 20-80 • C [56].…”

Section: Discussionmentioning

confidence: 99%

Protoenzymes: The Case of Hyperbranched Polymer-Scaffolded ZnS Nanocrystals

Mamajanov

Caudan

Jia

2020

Life

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Enzymes are biological catalysts that are comprised of small-molecule, metal, or cluster catalysts augmented by biopolymeric scaffolds. It is conceivable that early in chemical evolution, ancestral enzymes opted for simpler, easier to assemble scaffolds. Herein, we describe such possible protoenzymes: hyperbranched polymer-scaffolded metal-sulfide nanocrystals. Hyperbranched polyethyleneimine (HyPEI) and glycerol citrate polymer-supported ZnS nanocrystals (NCs) are formed in a simple process. Transmission electron microscopy (TEM) analyses of HyPEI-supported NCs reveal spherical particles with an average size of 10 nm that undergo only a modest aggregation over a 14-day incubation. The polymer-supported ZnS NCs are shown to possess a high photocatalytic activity in an eosin B photodegradation assay, making them an attractive model for the study of the origin of life under the “Zn world” theory dominated by a photocatalytic proto-metabolic redox reaction network. The catalyst, however, could be easily adapted to apply broadly to different protoenzymatic systems.

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“…When heparin was totally absent, the FA value of PEI-Mn-ZnS QDs was independent of AT. At pH 7.4, the PEI-Mn-ZnS QDs with abundant amino groups were highly positive charged, 37,42 heparin has a specic interaction towards AT, 39 thus the presence of heparin would mediate the interaction of PEI-Mn-ZnS QDs and AT and result in the increase of the FA value. When the heparin amount was low (e.g.…”

Section: Direct Fa Assays Of the Interaction Of Heparin And Pei-mn-zn...mentioning

confidence: 99%

Heparin-mediated fluorescence anisotropy assay of antithrombin based on polyethyleneimine capped Mn-doped ZnS quantum dots

Shao

Wang

2013

Analyst

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We presented a homogeneous heparin-mediated fluorescence anisotropy (FA) assay of antithrombin (AT) based on long-lived luminescent polyethyleneimine capped Mn-doped ZnS (PEI-Mn-ZnS) QDs. The PEI-Mn-ZnS QDs with long lifetime luminescence at 585 nm displayed a very low background of FA value, which was very helpful for FA assaying of large molecules. The medium heparin was crucial for AT determination, and different heparin amounts resulted in different linear range of detection and sensitivity. For example, the limit of detection (LOD) of 0.9 nM AT with a detection linear range from 8.6 nM to 21.5 nM was found when the heparin concentration was 75 μM. The proposed method also exhibited high selectivity over the coexisting or related proteins such as human serum albumin and thrombin.

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Polyethyleneimine/Manganese‐Doped ZnS Nanocomposites: A Multifunctional Probe for Two‐Color Imaging and Three‐Dimensional Sensing

Cited by 12 publications

References 44 publications

Multivariable Sensors for Ubiquitous Monitoring of Gases in the Era of Internet of Things and Industrial Internet

Multivariable Sensors for Ubiquitous Monitoring of Gases in the Era of Internet of Things and Industrial Internet

Protoenzymes: The Case of Hyperbranched Polymer-Scaffolded ZnS Nanocrystals

Heparin-mediated fluorescence anisotropy assay of antithrombin based on polyethyleneimine capped Mn-doped ZnS quantum dots

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