Silicon has been touted as one of the most promising anode materials for next generation lithium ion batteries. Yet, how to build energetic silicon-based electrode architectures by addressing structural and interfacial stability issues facing silicon anodes still remains a big challenge. Here, we develop novel kind self-supporting binder-free via encapsulation nanowires (SiNWs) with dual adaptable apparels (overlapped graphene (G) sheaths reduced oxide (RGO) overcoats). In resulted...

A pH-responsive surface has been fabricated by chemisorption of HS(CH2)9CH3 and HS(CH2)10COOH in an appropriate ratio onto a fractal-like gold structure. The exhibits superhydrophobicity acidic environment superhydrophilicity under basic conditions. Figure (right, top) shows acid droplet on the surface, while image below it base droplet.

A superhydrophobic coating on gold threads (see Figure) has been fabricated by combining layer-by-layer assembly, electrochemical deposition, and surface modification. It can be used to mimic the legs of water striders, potentially leading an understanding mechanism structure reducing quick propulsion.

All-inorganic cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) nanocrystals (NCs) are emerging as an important class of semiconductor materials with superior photophysical properties wide potential applications in optoelectronic devices. So far, only a few studies have been conducted to control the shape geometry CsPbX3 NCs. Here we report general approach directly synthesize two-dimensional (2D) mixed nanosheets uniform ultrathin thicknesses down monolayers. The key high-yield...

A novel anode structure composed of silicon nanowires dwelling in graphitic tubes is developed. The thus-fabricated 1D/1D hybrid exhibits good rate capability and remarkable cycling stability, which mainly originates from their structural advantages including the built-in void spaces robust line-to-line contact mode between components. As a service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized...

Gold threads modified with superhydrophobic or normal hydrophobic coatings are used as a model system in the study of contribution coating water strider to its floating and movement on surface. After depositing Pt aggregates one ends (see figure), gold able move H2O2 aqueous solution. The decreases fluidic drag during motion. Supporting information for this article is available WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c0752_s.pdf from author. Please note: publisher not...

The nanostructuring of silicon (Si) has recently received great attention, as it holds potential to deal with the dramatic volume change Si and thus improve lithium storage performance. Unfortunately, such transformative materials design principle generally been plagued by relatively low tap density hence mediocre volumetric capacity (and also energy density) battery. Here, we propose demonstrate an electrode consisting a textured silicon@graphitic carbon nanowire array. Such unique...

Abstract Three-dimensional superlattices consisting of nanoparticles represent a new class condensed materials with collective properties arising from coupling interactions between close-packed nanoparticles. Despite recent advances in self-assembly nanoparticle superlattices, the constituent have been limited to those that are attainable as monodisperse In addition, self-assembled generally weakly coupled due surface-coating ligands. Here we report fabrication three-dimensionally...

Self-assembly of nanocrystal (NC) building blocks into mesoscopic superstructures with well-defined symmetry and geometry is essential for creating new materials rationally designed properties. Despite the tremendous progress in colloidal assembly, it remains a fundamental challenge to assemble isotropic spherical NCs one-dimensional (1D) ordered superstructures. Here, we report general methodology that utilizes molecular clusters induce anisotropic assembly solution, yielding polymer-like,...

Self-organized long carbon nanotube ribbons consisting of aligned multiwalled nanotubes is fabricated using a simple solvent evaporation technique. The geometry the extraordinarily regular with rectangular cross sections, dimensions about 50−100-μm wide, 4−12-μm thick, and 100-mm long. could find use as electronic cables or in composite materials.

A simple method has been developed to prepare silica-encapsulated Ag (Ag@SiO2) Raman tags, embedded with the reporter molecules 4-mercaptobenzoic acid (MBA), using environmental-friendly solvents (mixed of ethanol and water) without vitreophilic pretreatment. The Ag@SiO2 tags exhibited excellent stability resistance high-concentration salts long-term storage. Sensitivity SERS could be enhanced by increasing MBA coverage reducing silica shell thickness, had versatility for bioassays....

We report on the fabrication of electrochemical double layer capacitor (EDLC) electrodes with aligned carbon nanotubes (CNTs) grown directly conductive substrates using an air assisted chemical vapor deposition technique. The fabricated EDLCs showed very small equivalent series resistances (∼few hundreds mΩ), a direct consequence integrating CNTs metal current collectors. specific capacitance used for EDLC increased decreasing CNT lengths and ranged from 10.75 F g−1 to 21.57 maximum energy...

Searching for new electrode materials with high capacities and excellent rate performance is crucial the development of next-generation lithium-ion batteries (LIBs). Silicon carbide (SiC), which traditionally considered to be electrochemically inert toward lithiation, has recently been demonstrated a potential high-performance anode material upon activation by surface graphitization. Despite great potential, it remains grand challenge synthesize SiC nanostructures precisely controlled...

We report an air-assisted chemical vapor deposition (CVD) method for the synthesis of super-long carbon nanotube (CNT) bundles. By mixing a small amount air in phase catalyst CVD process, lifetime can be dramatically increased, and extremely long dense aligned CNT bundles up to 1.5 cm achieved. Electron microscopy characterization shows that injection does not damage structures. Further, we have estimated individual ultra-long CNTs carry moderate current densities ∼10(5) A cm(-2), indicating...

In this work, the hydrogen-induced effects on CVD growth of high-quality graphene have been systematically studied by regulating parameters mainly related to hydrogen. Experimental results demonstrate that under a high hydrogen flow rate, competitive etching effect during process is more prominent and even shows macroscopic selectivity. Based these understandings, hexagonal domains with diverse edge modalities are controllably synthesized large scale elaborately managing existed formation...

We demonstrate a new kind of Si-based anode architectures consisting silicon nanowire/overlapped graphene sheet core-sheath nanocables (SiNW@G) intertwined with carbon nanotubes (CNTs). In such hybrid structure, the CNTs, mechanically binding SiNW@G together, act as buffer matrix to accommodate volume change SiNW@G, and overlapped sheets (that is, G sheaths) effectively prevent direct contact electrolyte during cycling, both which enable structural integrity interfacial stabilization...

Soil aggregate stability and organic carbon (OC) are regarded as effective indicators of soil structure quality. A long-term field experiment was established in 2006 to examine the influence tillage systems on aggregation OC a sandy loam Huang-Huai-Hai Plain China. The study involved eight treatments: plowing every year with (TS) without residue (T), 2 years (2TS) (2T), 4 (4TS) (4T), no (NTS) (NT). In 2013, samples were collected at depths 0–5, 5–10 10–20 cm, separated into three...

CH3NH3PbI3 capped PbS colloidal quantum dots have been successfully fabricated by solid-state ligand exchange from oleate and oleylamine PbS. The optimal solar cells made layer-by-layer solution deposition give a high power conversion efficiency of 4.25% with an impressive short-circuit photocurrent density 24.83 mA cm−2. Lead sulfide (PbS) (CQDs), which possess tunable near-infrared absorption,1 multiple exciton generation effect,2 processability,3 emerged as attractive candidates for thin...

The structural and electrical properties of the junction at Ag(In,Ga)Se2AIGS/Mo, Cu(In,Ga)Se2 CIGS/Mo layers were characterized. region between CIGS Mo featured a MoSe2 layer with layered hexagonal structure thickness 10-15 nm. c-axis was oriented perpendicular to layer, c -value 12.6 Å. However, no such observed interface AIGS Mo. This result also confirmed by energy-dispersive X-ray spectrometry diffraction measurements layer. formed an ohmic contact, while AIGS/Mo without Schottky...

Accurate design of high-performance 3D surface-enhanced Raman scattering (SERS) probes is the desired target, which possibly implemented with a prerequisite quantifying formidable multiple coupling effects involved. Herein, by combining theory and experiments on periodic Au/SiO

Cu2ZnSnS4 (CZTS) is a promising candidate material for photovoltaic applications; hence, ecofriendly methods are required to fabricate CZTS films. In this work, we fabricated nanocrystal inks by wet ball milling method, with the use of only nontoxic solvents, followed filtration. We performed centrifugation screen as-milled and obtain nanocrystals. The distribution nanoparticles during was examined were obtained after final centrifugal treatment. as-fabricated used deposit precursors...