We have successfully fabricated an asymmetric supercapacitor with high energy and power densities using graphene hydrogel (GH) 3D interconnected pores as the negative electrode vertically aligned MnO(2) nanoplates on nickel foam (MnO(2)-NF) positive in a neutral aqueous Na(2)SO(4) electrolyte. Because of desirable porous structure, specific capacitance rate capability GH MnO(2)-NF, complementary potential window two electrodes, elimination polymer binders conducting additives, can be cycled...

We present a one-step approach to polydopamine-modified graphene hydrogel, with dopamine serving as both reductant and surface functionalization agents. The synthetic method is based on the spontaneous polymerization of self-assembly nanosheets into porous hydrogel structures. Benefiting from abundant functional groups polydopamine high specific areas three-dimensional interconnected pores, prepared material exhibits adsorption capacities toward wide spectrum contaminants, including heavy...

A number of procedures are currently available to encapsulate and solubilize hydrophobic semiconductor Quantum Dots (QDs) for biological applications. Most these based on the use small-molecule coordinating ligands, amphiphilic polymers, or lipids. However, it is still not clear how different surface coating molecules affect optical, colloidal, chemical properties solubilized QDs. Here we report a systematic study examine effects chemistry hydrodynamic size, fluorescence quantum yield,...

Finding the right angle: The contact angle of nanoparticles at water/oil interface can be engineered close to 90° by capping with ligands containing carboxylic ester terminal groups. This drives self-assemble into close-packed films (see picture), and thus provides opportunity create two- or three-dimensional homo- heterogeneous nanostructures for electronic, optoelectrical, magnetic applications.

We report the development of cell-penetrating quantum dots (QDs) based on use multivalent and endosome-disrupting (endosomolytic) surface coatings. Hyperbranched copolymer ligands such as polyethylene glycol (PEG) grafted polyethylenimine (PEI-g-PEG) are found to encapsulate solubilize luminescent through direct ligand-exchange reactions. Because positive charges a "proton sponge effect" associated with amine groups, this class ligand-exchanged QDs is able penetrate cell membranes also...

We report the development of bioconjugated plasmonic vesicles assembled from SERS-encoded amphiphilic gold nanoparticles for cancer-targeted drug delivery. This new type assemblies with a hollow cavity can play multifunctional roles as delivery carriers anticancer drugs and SERS-active imaging probes to specifically label targeted cancer cells monitor intracellular have shown that pH-responsive disassembly vesicle, stimulated by hydrophobic-to-hydrophilic transition hydrophobic brushes in...

Despite its growing promise in cancer treatment, ferrotherapy has low therapeutic efficacy due to compromised Fenton catalytic efficiency tumor milieu. We herein report a hybrid semiconducting nanozyme (HSN) with high photothermal conversion for photoacoustic (PA) imaging-guided second near-infrared ferrotherapy. HSN comprises an amphiphilic polymer as converter, PA emitter and iron-chelating catalyst. Upon photoirradiation, generates heat not only induce cytotoxicity but also enhance...

We report a novel ligand-induced etching process in which hyperbranched and multivalent coordinating polymers such as polyethylenimine (PEI) react with preformed gold nanocrystals to form atomic clusters that are soluble water highly fluorescent upon UV light excitation. These "as-prepared" appear be an oxidized electronic state, their excitation emission maxima located at 421 505 nm, respectively. Upon treatment by strong reducing agents NaBH4, the cluster's peaks shifted 353 445 nm....

We report a facile one-step ultrasonication-assisted electrochemical method to synthesize nanocomposites of graphene and PtNi alloy nanoparticles (NPs) their uses for highly selective nonenzymatic glucose detection. have demonstrated that the obtained exhibit collection unique features including well-dispersed NPs with features, high NP loading, effective reduction oxide (GO). And resulting nanoelectrocatalyst shows significantly improved performance in amperometric detection, compared...

Epidermal growth factor receptor (EGFR) targeted nanoparticle are developed by conjugating a single-chain anti-EGFR antibody (ScFvEGFR) to surface functionalized quantum dots (QDs) or magnetic iron oxide (IO) nanoparticles. The results show that ScFvEGFR can be successfully conjugated the nanoparticles, resulting in compact nanoparticles specifically bind and internalized EGFR-expressing cancer cells, thereby producing fluorescent signal resonance imaging (MRI) contrast. In vivo tumor...

We have developed a class of blackbody materials, i.e., hyperbranched Au plasmonic blackbodies (AuPBs), compact sizes (<50 nm). The AuPBs were prepared in seedless and surfactant-free approach based on the use mussel-inspired dopamine. Strong intraparticle coupling among branches close proximity leads to intense uniform broadband absorption across 400–1350 nm. imparts AuPB with superior photothermal efficiency >80% closely matched activity first near-infrared (NIR-I) second (NIR-II) spectral...

Abstract Flexible biosensors are of considerable current interest for the development portable point‐of‐care medical products, minimally invasive implantable devices, and compact diagnostic platforms. A new type flexible electrochemical sensor fabricated by depositing high‐density Pt nanoparticles on freestanding reduced graphene oxide paper (rGOP) carrying MnO 2 nanowire networks is reported. The triple‐component design offers possibilities to integrate mechanical electrical properties...

We report the design of all-solid-state asymmetric supercapacitors based on free-standing carbon nanotube/graphene (CNTG) and Mn(3)O(4) nanoparticles/graphene (MG) paper electrodes with a polymer gel electrolyte potassium polyacrylate/KCl. The composite nanotubes or nanoparticles uniformly intercalated between graphene nanosheets exhibited excellent mechanical stability, greatly improved active surface areas, enhanced ion transportation, in comparison pristine paper. combination two endowed...

We have developed a new class of plasmonic vesicular nanostructures assembled from amphiphilic gold nanocrystals with mixed polymer brush coatings. One major finding is that the integration (nanoparticles and nanorods) two types chemically distinct grafts, which are analogous to block copolymers as whole, creates type hybrid building inheriting amphiphilicity-driven self-assembly form structures properties nanocrystals. In contrast other structures, disruption vesicles can be triggered by...

Facilely synthesized cationic peptidopolysaccharides, which have a bacterial peptidoglycan-mimetic structure, show outstanding broad-spectrum activities against clinically significant bacteria and fungi low mammalian cytotoxicity. Their structural affinity with microbial cell-wall constituents promotes penetration to reach the cytoplasmic membrane resulting in excellent antimicrobial activity high selectivity. Detailed facts of importance specialist readers are published as "Supporting...

We report a versatile strategy based on the use of multifunctional mussel-inspired polydopamine for constructing well-defined single-nanoparticle@metal–organic framework (MOF) core–shell nanohybrids. The capability to form robust conformal coating colloidal substrates any composition and direct heterogeneous nucleation growth MOFs makes it possible customized structural integration broad range inorganic/organic nanoparticles functional MOFs. Furthermore, unique redox activity adds additional...

Recyclable nanocatalysts of core–shell bimetallic nanocrystals are developed through polydopamine coating-directed one-step seeded growth, interfacial assembly, and substrate-immobilization Au@Ag nanocrystals. This strategy provides new opportunities to design optimize heterogeneous with tailored size, morphology, chemical configuration, supporting substrates for metal-catalyzed reactions. As a service our authors readers, this journal information supplied by the authors. Such materials peer...

Metal-organic frameworks (MOFs) hold promising potential in energy storage but are limited by poor conductivity. In this work, a metal-organic framework/polypyrrole hybrid is constructed facile one-pot electrodeposition method the presence of dopamine. An all-solid-state fabric supercapacitor based on demonstrates excellent electrochemical energy-storage performance, which achieves specific capacitance 10 mF cm-1 (206 cm-2), power density 132 μW (2102 and an 0.8 μWh (12.8 cm-2). The stable...

Janus nanoparticles (JNPs) refer to the integration of two or more chemically discrepant composites into one structure system. Studies JNPs have been significant interest due their interesting characteristics stemming from asymmetric structures, which can integrate different functional properties and perform synergetic functions simultaneously. Herein, we present recent progress particles, comprehensively detailing fabrication strategies applications. First, classification is divided three...