Composite PET Membrane with Nanostructured Ag/AgTCNQ Schottky Junctions: Electrochemical Nanofabrication and Charge‐Transfer Properties

Abstract

Large-area nanostructured Ag/Ag-tetracyanoquinodimethane (TCNQ) Schottky junctions are fabricated electrochemically on a mesoporous polyethylene terephthalate (PET) membrane-supported water/1, 2-dichloroethane (DCE) interface. When the interface is polarized, Ag(+) ions transfer across the PET membrane from the aqueous phase and are reduced to form metallic Ag on the PET membrane, which reacts further with tetracyanoquinodimethane (TCNQ) in the DCE phase to form nanostructured Ag/AgTCNQ Schottky junctions. Once the mesoporous membrane is blocked by metallic Ag, a bipolar mechanism is proposed to explain the successive growth of AgTCNQ nanorods and Ag film on each side of the PET membrane. Due to the well-formed nanostructure of Ag/AgTCNQ Schottky junctions, the direct electrochemical behavior is observed, which is essential to explain the physicochemical mechanism of its electric performance. Moreover, the composite PET membrane with nanostructured Ag/AgTCNQ Schottky junctions is tailorable and can be assembled directly into electric devices without any pretreatment.

Ion-transfer voltammetric determination of folic acid at meso-liquid–liquid interface arrays

“…Recently, our group has successfully synthesized a novel polyethylene terephthalate (PET)-templated hybrid mesoporous silica membrane (HMSM) with a unique structure of pores-in-pores and meso-sized selectivity, and applied it to support meso-water-1,2-dichloroethane (W-DCE) interface arrays for size-selective ion transfer or extraction. 46 Moreover, such a PET-templated HMSM can be further applied to electrochemically fabricate a membrane electric-device based on the electrochemistry at the membrane-supported L-L interface as described by Huang et al 47 The above mentioned results inspired us to further apply such a HMSM in ion-transfer voltammetric studies for the determination of biological substrates, such as FA. Herein, the voltammetric studies on the simple IT behaviors of FA were firstly performed for the quantitative determinations of FA at two types of meso-L-L interface arrays, namely meso-water-1,6dichlorohexane (W-DCH) and meso-water-organogel interface arrays supported by using the PET-templated HMSM.…”

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

“…During the past decade, lots of novel hybrid mesoporous membranes composed of mesoporous materials, such as meso-silica or meso-titania, not on the surface but within the inside-pores of some porous membranes have attracted great attention due to their unique structure with pores-in-pores 1 2 3 4 , and widely potential applications in the templated-syntheses of nanomaterials 5 6 , nanofiltration 7 8 9 10 , sensors 11 12 13 , electronic devices 14 and lithium batteries 15 . Normally, dual templates including various porous membranes and surfactants have been respectively employed as the morphology-directing hard template and the structure-directing soft template in the synthesis of hybrid mesoporous membranes.…”

“…Surface modification is achieved by coating or grafting a functional layer on the prepared membrane surface, but not the pores inside the membrane 21 22 , which is different from the blending modification based on a single step 23 24 25 . Since the surfaces and the inside-pores of PVDF membranes can provide a window of opportunity to be modified 19 20 and those hybrid mesoporous membranes prepared by using dual-templated synthesis method can introduce desirable properties into the original hydrophilic membranes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 , it is necessary to further explore the fabrication of hybrid mesoporous membranes by employing hydrophobic porous membranes as the hard templates.…”

Bottom-up on-crystal in-chip formation of a conducting salt and a view of its restructuring: from organic insulator to conducting “switch” through microfluidic manipulation

“…7–11 The phenomenon has been assigned to a reversible redox reaction induced by the local electric-field where silver metal and neutral TCNQ are formed at the interface, and mobility of silver ions has been inferred in this process 20 and could well be happening in our experiments where the AFM tip is in contact with the material's surface.…”

“…That behavior is similar to the properties of the silver-TCNQ salt prepared in different ways. [7][8][9][10][11] Here we show the possibility of constructing "molecular circuits" where the doped material actually acts as a macroscopic conducting component (in contrast to the previous approaches where small molecular components were obtained on electronic devices 6,[12][13][14][15] ) and open new vistas for molecular materials for electronics where the bulk materials form part of the devices. We use a bulk crystal as an object where conducting regions can be generated in situ thanks to a pneumatic clamp holding the crystals in place in the microuidic system that also allows positioning of reagent ows.…”