A double-layered nanoporous membrane suitable for virus filtration has been fabricated. The top layer cylindrical pores with diameters of 15 nm and a narrow pore size distribution (see figure). bottom support is conventional microfiltration membrane. This asymmetric completely blocks human rhinovirus type 14 (colored green) from penetrating into pores, while proteins such as bovine serum albumin yellow) freely pass through the pores.

Abstract Fe 3 O 4 nanocrystals confined in mesocellular carbon foam (MSU‐F‐C) are synthesized by a “ host–guest ” approach and tested as an anode material for lithium‐ion batteries (LIBs). Briefly, iron oxide precursor, Fe(NO ) ·9H 2 O, is impregnated MSU‐F‐C having uniform cellular pores ∼30 nm dia­meter, followed heat‐treatment at 400 °C h under Ar. Magnetite with sizes between 13–27 then successfully fabricated inside the of MSU‐F‐C, confirmed transmission electron microscopy (TEM),...

The effect of organoclay platelets on morphologies three blend compositions (80/20, 20/80, and 99.5/0.5 w/w) nylon-6 (N6) poly(ethylene-ran-propylene) rubber (EPR) has been studied by scanning transmission electron micrographs. For the 80/20 (w/w) N6/ERP blend, dispersed domain size (D) EPR phase in N6 matrix decreased significantly even if a small amount was added. extent decrease D this similar to N6/EPR with an in-situ reactive compatibilizer EPR-g-maleic anhydride. clay did not change...

Abstract The triboelectric nanogenerator (TENG) is a new type of energy generator first demonstrated in 2012. TENGs have shown potential as power sources for electronic devices and sensors detecting mechanical chemical stimuli. To date, studies on focused primarily optimizing the systems circuit designs or exploring possible applications. Even though triboelectricity highly related to material properties, materials been relatively less investigated. This review article introduces recent...

We introduce a simple but robust method to fabricate an ultrahigh-density array of silver nanoclusters for surface-enhanced Raman spectroscopy (SERS) substrate with high sensitivity and excellent reproducibility at very large area (wafer scale) based on polystyrene-block-poly(4-vinylpyridine) copolymer (PS-b-P4VP) micelles. After nitrates were incorporated into the micelle cores (P4VP) followed by reduction nanoclusters, we systematically controlled gap distance between two neighboring...

A mesostructured spinel Li4Ti5O12 (LTO)-carbon nanocomposite (denoted as Meso-LTO-C) with large (>15 nm) and uniform pores is simply synthesized via block copolymer self-assembly. Exceptionally high rate capability then demonstrated for Li-ion battery (LIB) negative electrodes. Polyisoprene-block-poly(ethylene oxide) (PI-b-PEO) a sp2-hybridized carbon-containing hydrophobic employed structure-directing agent. Then the assembled composite material crystallized at 700 °C enabling conversion to...

Abstract Electronics wastes (e‐wastes) are the major concern in rapid expansion of smart/wearable/portable electronics modern high‐tech society. Informal processing and enormous gathering e‐wastes can lead to adverse human/animal health effects environmental pollution worldwide. Currently, these issues a big headache require scientific community develop effective green energy harvesting technologies using biodegradable/biocompatible materials. Piezoelectric/triboelectric nanogenerators...

Abstract Electric devices has become a necessity in modern smart societies. The energy research community is continually exploring new solutions that can be employed as potential and reliable alternatives to satisfy future requirements this context. Triboelectric/piezoelectric nanogenerators (TNGs/PNGs) are considered promising renewable harvesting technologies. TNGs/PNGs gaining considerable attention because of their advantages such ease fabrication, cost effectiveness, flexibility,...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the order-disorder transition temperature block copolymersChang Dae Han, Jinhwan Kim, and Jin Kon KimCite this: Macromolecules 1989, 22, 1, 383–394Publication Date (Print):January 1989Publication History Published online1 May 2002Published inissue 1 January 1989https://pubs.acs.org/doi/10.1021/ma00191a071https://doi.org/10.1021/ma00191a071research-articleACS PublicationsRequest reuse permissionsArticle...

Abstract We introduce a nanoporous membrane suitable for virus filtration with good dimensional stability under high pressures maintaining selectivity. The consists of double layer: upper layer is film pore size ∼17 nm and thickness ∼160 nm, which was prepared by polystyrene‐ block ‐poly(methyl methacrylate) copolymer (PS‐ b ‐PMMA) where PMMA removed ultraviolet irradiation followed rinsing acetic acid. combined conventional micro‐filtration to enhance mechanical strength. employed in this...

Abstract A structured polymer solar cell architecture featuring a large interface between donor and acceptor with connecting paths to the respective electrodes is explored. To this end, poly‐(3‐hexylthiophene) (P3HT) nanorods oriented perpendicularly indium tin oxide (ITO) glass are fabricated using an anodic aluminum template. It found that P3HT chains in bulk films or differently; perpendicular parallel ITO substrate, respectively. Such chain alignment of enhanced electrical conductivity...

Ultrahigh density arrays of conducting polypyrrole (PPy) nanorods are fabricated directly on the indium-tin oxide coated glass by an electropolymerization within a porous diblock copolymer template. The shown to have conductivity much higher than thin PPy films, due high degree chain orientation, even though separation distance for two neighboring main chains is as small 0.37 nm. ultrahigh polymer potential applications sensor materials, nanoactuators, and organic photovoltaic devices.

A new drug delivery device using cylindrical block copolymer nanochannels was successfully developed for controlled protein applications. Depending on the hydrodynamic diameter of drugs, pore size in could be precisely down to 6 nm by Au deposition. Zero-order release bovine serum albumin (BSA) and human growth hormone (hGH) single-file diffusion, which has been observed gas diffusion through zeolite pores, realized up 2 months without denaturation. Furthermore, a nearly constant vivo hGH...

We report on the fabrication of electrically responsive nanoporous membrane based polypyrrole doped with dodecylbenzenesulfonate anion (PPy/DBS) that was electropolymerized upper part anodized aluminum oxide membrane. The has regular pore size and very high density. Utilizing a large volume change PPy/DBS depending electrochemical state, acutated electrically. actuation pores experimentally confirmed by in situ atomic force microscopy flux measurement. also demonstrated successfully...

An ordered mesoporous WO3−x material was employed for use as a supercapacitor electrode. This exhibited high rate capability and an excellent capacitance (366 μF cm−2, 639 F cm−3), which were probably attributed to the large mesopores, electrical conductivity, density.

A series of novel amphiphilic multiarm, star-like block copolymers, poly(acrylic acid)-b-polystyrene (PAA-b-PS) based on β-cyclodextrin (β-CD) with well-defined molecular architectures, weight, and ratio two dissimilar blocks were prepared by sequential atom transfer radical polymerization (ATRP). β-CD 21 hydroxyl groups was esterified the reaction its end 2-bromoisobutyryl bromide, producing heptakis[2,3,6-tri-O-(2-bromo-2-methylpropionyl]-β-cyclodextrin) (denoted 21-Br-β-CD). Subsequently,...

In view of the fact that log G′ versus G″ plots for homogeneous polymer systems are virtually independent temperature, we have suggested before attempting to apply time-temperature superposition multicomponent and/or multiphase systems, one must first observe whether or not G′versus show temperature independence. We demonstrated very sensitive a variation in morphological state multicomponent/multiphase (e.g. immiscible blends, microphase-separated block copolymers, liquid crystalline...

We introduce a novel method for fabricating breath figure patterns on homopolymer film by spin coating of polymer solutions with various solvents. The homopolymers employed in this study were cellulose acetate butyrate, monocarboxylated end-functional polystyrene, and poly(methyl methacrylate). Breath generated even when water-miscible solvent such as tetrahydrofuran (THF) was used solvent. succeeded generating under dry environment (relative humidity less than 30%), water directly added...

Photovoltaic devices of end-functional-group-modified poly 3-(hexylthiophene)/[6,6]-phenyl-C61 butyric acid methyl ester (P3HT:PCBM; see figure) are fabricated with thermal annealing. The surface energies between donor and acceptor were matched by varying the end group, which can be used to control vertical horizontal phase separation in active layer, leading mixed nanomorphology optimized separation, low series resistance, high performance for solar cell devices. Organic photovoltaic have...

This feature article reviews controlled drug release based on nanoporous membranes for potential medical applications. First, we describe the preparations of by top-down and bottom-up methods, combination two. Then, sustained long-term delivery stimuli-responsive utilizing are explained. The system using can be used a new therapy various diseases through patient-customized treatment.