A novel smart membrane with ion-recognizable nanogels as gates on interconnected pores for simple and rapid detection of trace lead(II) ions in water

Wang, Yuan; Liu, Zhuang; Luo, Feng; Peng, Han‐Yu; Shugui, Zhang; Xie, Rui; Ju, Xiao‐Jie; Wang, Wei; Faraj, Yousef; Chu, Liang‐Yin

doi:10.1016/j.memsci.2019.01.002

Cited by 31 publications

(16 citation statements)

References 49 publications

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“…The principle of operation of such membranes is based on the transport of ions through the pores of the membrane. If a stable complex is formed between the ether and the separated ion, these ions will be retained on the membrane, as is the case with the formation of specific 'ion gates' membranes [67][68][69][70][71].…”

Section: Selective Propertiesmentioning

confidence: 99%

Enhanced Specific Mechanism of Separation by Polymeric Membrane Modification—A Short Review

2021

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Membrane technologies have found a significant application in separation processes in an exceeding range of industrial fields. The crucial part that is decided regarding the efficiency and effectivity of separation is the type of membrane. The membranes deal with separation problems, working under the various mechanisms of transportation of selected species. This review compares significant types of entrapped matter (ions, compounds, and particles) within membrane technology. The ion-exchange membranes, molecularly imprinted membranes, smart membranes, and adsorptive membranes are investigated. Here, we focus on the selective separation through the above types of membranes and detect their preparation methods. Firstly, the explanation of transportation and preparation of each type of membrane evaluated is provided. Next, the working and application phenomena are evaluated. Finally, the review discusses the membrane modification methods and briefly provides differences in the properties that occurred depending on the type of materials used and the modification protocol.

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Section: Selective Propertiesmentioning

confidence: 99%

Enhanced Specific Mechanism of Separation by Polymeric Membrane Modification—A Short Review

2021

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“…Nanogels, as stand-alone nanoparticles, have been proposed as nanocarriers of chemical and biological entities for therapeutic purposes and/or contrast agents for medical imaging [46][47][48], as active components of biochips or biosensors [49], building blocks of in situ forming scaffolds for tissue engineering, [50,51] cell culture systems [52,53], and antimicrobial coatings [54,55], and as compo-nents of wound dressing formulations [56,57]. Other notable applications of nanogels in related fields include iron chelation therapy [58], biochemical separation and contaminant removal [59,60], and bio-catalysis [61].…”

Section: Biomedical Applications Of Bio-hybrid Nanogelsmentioning

confidence: 99%

Micro- to Nanoscale Bio-Hybrid Hydrogels Engineered by Ionizing Radiation

2020

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Bio-hybrid hydrogels consist of a water-swollen hydrophilic polymer network encapsulating or conjugating single biomolecules, or larger and more complex biological constructs like whole cells. By modulating at least one dimension of the hydrogel system at the micro- or nanoscale, the activity of the biological component can be extremely upgraded with clear advantages for the development of therapeutic or diagnostic micro- and nano-devices. Gamma or e-beam irradiation of polymers allow a good control of the chemistry at the micro-/nanoscale with minimal recourse to toxic reactants and solvents. Another potential advantage is to obtain simultaneous sterilization when the absorbed doses are within the sterilization dose range. This short review will highlight opportunities and challenges of the radiation technologies to produce bio-hybrid nanogels as delivery devices of therapeutic biomolecules to the target cells, tissues, and organs, and to create hydrogel patterns at the nano-length and micro-length scales on surfaces.

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“…1(b give the number of ions transported through one nanogate per unit time and the ion flow rate, respectively. e and N A are the absolute value of the charge of an electron, × − C 1.602 10 19 and Avogadro constant, × − mol 6.022 10 23 1 , respectively. Then the ion flux can be evaluated with the following equation:…”

Section: Ion Flux−voltage Curve Measurementsmentioning

confidence: 99%

“…proteins, not ions. Wang et al [23] and Liu et al [24] reported smart membranes with nanogates modulating flux of water, not ions. Harrel et al [25] developed a nanogate, with voltage gating, consisting of negatively charged DNA strands attached at the pore entrance.…”

Section: Introductionmentioning

confidence: 99%

A membrane with ion fluxes responsive to temperature, pH and voltage

Yang

Whiting

Dettori

2019

Journal of Membrane Science

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Cell membranes of biological cells embedded with nuclear pore complexes (NPCs) are capable of controlling the flow of ions, e.g. Na + , K + and Ca 2+ by responding to stimuli, e.g. pH and voltage. From the inspiration of NPCs, researchers have been endeavoring to develop nanogates to achieve the control of ion transport, but the developed nanogates only have a low selectivity, the factor of change (FC) in ion fluxes due to ON/OFF switching. To our knowledge, nanogates with high responsiveness to temperature changes have not been reported. As such membranes etched with nanopores having a high selectivity (FC) and the reversible gating of temperature, pH and voltage were to be developed in the work. The nanogates were modified with DNA strands, whose linkers, the six nucleobases at 3′ ends, are complementary. According to the experimental results, at mildly acidic pH values, e.g. pH 5.3, the prepared nanogate is in an open state, while at neutral pH values, e.g. pH 7.9, it is shut off. The change in ion fluxes is up to a factor of 90, which is remarkably high compared to other nanogates reported. It is observed experimentally that promoting the number of the complementary nucleobases at the 3′ ends of the strands would improve nanogate performance significantly, while varying the other nucleobases exerts little effects. Hence the formation of nucleobase pairs among the complementary nucleobases at the 3′ ends of the strands leads to the binding of various strands, self-assembly of a strand web and blockage of ion transport. When the temperature is increased, due to the promotion of the thermal motion of DNA strands, the nucleobase pairs and the strand web will not be generated and the nanogate will remain open even at pH 7.9. Hence the nanogate developed is capable of responding to temperature changes. Further experiments were performed to investigate the influence of the NaCl concentrations and small opening diameters exerted on nanogate performance.

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A novel smart membrane with ion-recognizable nanogels as gates on interconnected pores for simple and rapid detection of trace lead(II) ions in water

Cited by 31 publications

References 49 publications

Enhanced Specific Mechanism of Separation by Polymeric Membrane Modification—A Short Review

Enhanced Specific Mechanism of Separation by Polymeric Membrane Modification—A Short Review

Micro- to Nanoscale Bio-Hybrid Hydrogels Engineered by Ionizing Radiation

A membrane with ion fluxes responsive to temperature, pH and voltage

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