Science China Materials

http://link.springer.com/journal/40843

List of Papers (Total 284)

Fabrication of open-cellular (porous) titanium alloy implants: osseointegration, vascularization and preliminary human trials

In this study we describe the fabrication of a variety of open-cellular titanium alloy (TI-6Al-4V) implants, both reticular mesh and foam structures, using electron beam melting (EBM). These structures allow for the elimination of stress shielding by adjusting the porosity (or density) to produce an elastic modulus (or stiffness) to match that of both soft (trabecular) and hard ...

Exploring an effective oxygen reduction reaction catalyst via 4e− process based on waved-graphene

A novel pure and N-doped waved-graphene electro-catalyst with various wavelengths for oxygen reduction reaction (ORR) is explored in acid medium based on the firstprinciples calculations. The associative and dissociative mechanism are both explored from the O2 adsorption to the H2O formation step by step, from which the dissociative mechanism is likely the only way with an ...

Multifunctional Cu1.94S-Bi2S3@polymer nanocomposites for computed tomography imaging guided photothermal ablation

The doping of radiocontrast agent such as bismuth (Bi) in copper chalcogenide nanocrystals for computed tomography (CT) imaging guided photothermal therapy (PTT) has drawn increasing attention. However, the doping of Bi often suffers from the weak CT signal due to the low Bi doping concentration and deteriorates the PTT efficacy of copper chalcogenides. Here we report a ...

Asymmetric indenothiophene-based non-fullerene acceptors for efficient polymer solar cells

Three new asymmetric acceptor-donor-acceptor structured molecules are designed and synthesized by incorporating indenothiophene as the central core. Their bandgaps and energy levels can be easily tuned by varying the electron withdrawing ability of the terminal groups such as dicyanovinyl, 3-ethylrhodanine, and 2-(1,1-dicyanomethylene)-3-ethyl-rhodanine. Inverted polymer solar ...

Hydrothermal synthesis of coherent porous V2O3/carbon nanocomposites for high-performance lithium- and sodium-ion batteries

Carbonaceous composite materials have been extensively studied in energy storage and conversion devices and commonly are fabricated from liquid precursors. In this work, we reported an unusual formation of vanadium oxide and carbon nanocomposite from microsized VO2 micro-spheres through a “dissolution and recrystallization” process with the assistance of LiH2PO4. The obtained ...

Aluminum-based materials for advanced battery systems

There has been increasing interest in developing micro/nanostructured aluminum-based materials for sustainable, dependable and high-efficiency electrochemical energy storage. This review chiefly discusses the aluminum-based electrode materials mainly including Al2O3, AlF3, AlPO4, Al(OH)3, as well as the composites (carbons, silicons, metals and transition metal oxides) for ...

Large-scale functionalization of biomedical porous titanium scaffolds surface with TiO2 nanostructures

Construction of functional porous titanium scaffold is drawing ever growing attention, due to its effectiveness in solving the mechanical mismatch between titanium implant and bone tissue. However, the poor water permeability as well as the problem in achieving uniform surface modification inside scaffold hinders the further biomedical application of porous titanium scaffold. In ...

Collective motion of bacteria and their dynamic assembly behavior

In recent years, active matter systems have attracted considerable attentions due to their complex dynamic behaviors in physical and material science. In particular, microorganism systems have served as model systems for observing dynamic assembly and collective motility of active particles and significant progresses have been made on in-depth understanding of how high density ...

Directing nucleation and growth kinetics in solution-processed hybrid perovskite thin-films

A heightened understanding of nucleation and growth mechanisms is paramount if effective solution processing of organic-inorganic perovskite thin-films for optoelectronic applications is to be achieved. Many fabrication techniques have been utilized previously to develop high-performance perovskite layers but there remains an absence of a unifying model that describes accurately ...

Highly active CeO2 hollow-shell spheres with Al doping

Metal oxide hollow structures are of great interest in many current and emerging areas of technology. This paper presents a facile and controlled protocol for the synthesis of Al-doped CeO2 hollow-shell spheres (CHS), where the dopant confers enhanced stability and activity to the material. These Al-doped CeO2 hollow-shell spheres (ACHS) possess a controllable shell number of up to ...

Fabrication of compact and stable perovskite films with optimized precursor composition in the fast-growing procedure

The fast-growing procedure (FGP) provides a simple, high-yield and lead (Pb)-release free method to prepare perovskite films. In the FGP, the ultra-dilute perovskite precursor solution is drop-cast onto a hot (~240°C) substrate, where a perovskite film grows immediately accompanied by the rapid evaporation of the host solvent. In this process, all the raw materials in the precursor ...

F-doped O3-NaNi1/3Fe1/3Mn1/3O2 as high-performance cathode materials for sodium-ion batteries

The F-doped O3-type NaNi1/3Fe1/3Mn1/3O2− x F x (x = 0, 0.005, 0.01, 002 and noted as NFM-F0, NFM-F0.005, NFM-F0.01, NFM-F0.02, respectively, united as NFM-Fs) cathode materials were investigated systematically. The rate performance and capacity retention of the O3-type cathode materials are significantly improved as a function of specific F-doping levels. Optimum performance is ...

Conditions for magnetic and electronic properties of ultrathin Ni–Fe hydroxide nanosheets as catalysts: a DFT+U study

The effects of cation ordering and surface compensating anions on the magnetic structure and catalytic properties of unilamellar Ni–Fe hydroxide nanosheets are studied by using the density functional theory (DFT) plus U method. Fe-segregation in the nanosheets yields magnetic domains with different spin alignments, while the surface compensating anions affect the local moments and ...

Bimetallic organic frameworks derived CuNi/carbon nanocomposites as efficient electrocatalysts for oxygen reduction reaction

Catalysts of oxygen reduction reaction (ORR) play key roles in renewable energy technologies such as metal-air batteries and fuel cells. Despite tremendous efforts, highly active catalysts with low cost remain elusive. This work used metal-organic frameworks to synthesize non-precious bimetallic carbon nanocomposites as efficient ORR catalysts. Although carbon-based Cu and Ni are ...

Magnetic drug delivery systems

There has been unprecedented progress in the development of biomedical nanotechnology and nanomaterials over the past few decades, and nanoparticle-based drug delivery systems (DDSs) have great potential for clinical applications. Among these, magnetic drug delivery systems (MDDSs) based on magnetic nanoparticles (MNPs) are attracting increasing attention owing to their favorable ...

Enhanced adsorption of carbonyl molecules on graphene via π-Li-π interaction: a first-principle study

Carbonyl compounds with elements of C, H, and O and reversible redox-active centers are promising electrode materials in rechargeable batteries owing to their high theoretical capacity, structure flexibility and resources abundance. However, the low conductivity and the dissolution of active molecules in organic electrolyte limit the practical application. Immobilizing the ...

Albumin nanoreactor-templated synthesis of Gd2O3/CuS hybrid nanodots for cancer theranostics

It remains a great challenge to explore the facile way to fabricate multi-component nanoparticles in theranostic nanomedicine. Herein, an albumin nanoreactor templated synthesis of theranostic Gd2O3/CuS hybrid nanodots (NDs) has been developed for multimodal imaging guided photothermal tumor ablation. Gd2O3/CuS NDs are found to possess particle size of 4.4 ± 1.1 nm, enhanced ...

Tuning the molecular size of site-specific interferon-polymer conjugate for optimized antitumor efficacy

The covalent attachment of protein-resistant polymers to therapeutic proteins is a widely used method for extending their in vivo half-lives; however, the effect of molecular weight of polymer on the in vitro and in vivo functions of protein-polymer conjugates has not been well elucidated. Herein we report the effect of molecular weight of poly(oligo(ethylene glycol) methyl ether ...

Hydrogel-based phototherapy for fighting cancer and bacterial infection

Hydrogels constitute a group of polymeric materials which can hold a large amount of water in their three-dimensional networks due to their hydrophilic structures. In the past few years, they have been researched for various biomedical applications, such as drug/cell carriers, tissue engineering, and biosensors. Particularly, the hydrogels used as drug delivery systems have shown ...

Symmetry-breaking assembled porous calcite microspheres and their multiple dental applications

Biomedical applications of porous calcium carbonate (CaCO3) microspheres have been mainly restricted by their aqueous instability and low remineralization rate. To overcome these obstacles, a novel symmetry-breaking assembled porous calcite microsphere (PCMS) was constructed in an ethanol/water mixed system using a two-step vapor-diffusion/aging crystallization strategy. In ...

Progress in organic-inorganic hybrid halide perovskite single crystal: growth techniques and applications

As a new generation of solution-processable optoelectronic materials, organic-inorganic hybrid halide perovskites have attracted a great deal of interest due to their high and balanced carrier mobility, long carrier diffusion length and large light absorption coefficient. These materials have demonstrated wide applications in solar cell, light-emitting diode, laser, photodetector, ...

Controlled growth of Cu3Se2 nanosheets array counter electrode for quantum dots sensitized solar cell through ion exchange

Copper selenide (Cu x Se) has great potential as counter electrode for quantum dots sensitized solar cell (QDSSC) due to its excellent electrocatalytic activity and lower charge transfer resistance. A novel ion exchange method has been utilized to fabricate Cu3Se2 nanosheets array counter electrode. CdS layer was first deposited by sputtering and used as a template to grow compact ...