Science China Materials

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

List of Papers (Total 307)

Fabrication of multifunctional carbon encapsulated Ni@NiO nanocomposites for oxygen reduction, oxygen evolution and lithium-ion battery anode materials

Multifunctional carbon encapsulated Ni@NiO nanocomposites (Ni@NiO@C) were synthesized for applications in oxygen reduction reactions (ORR), oxygen evolution reactions (OER) and lithium-ion batteries (LIB). The morphology was investigated via SEM and TEM, suggesting that the Ni@NiO@C nanocomposites have uniform and spherical core-shell structures. When the Ni@NiO@C nanocomposite is ...

Defective MoS2 electrocatalyst for highly efficient hydrogen evolution through a simple ball-milling method

Molybdenum disulfide (MoS2) has attracted extensive attention as an alternative to replace noble electrocatalysts in the hydrogen evolution reaction (HER). Here, we highlight an efficient and straightforward ball milling method, using nanoscale Cu powders as reductant to reduce MoS2 engineering S-vacancies into MoS2 surfaces, to fabricate a defectrich MoS2 material (DR-MoS2). The ...

Ethylene glycol-mediated synthetic route for production of luminescent silicon nanorod as photodynamic therapy agent

One-dimensional silicon nanorod (SiNR) has attracted considerable interest because of its unique morphology and electronic-optical properties that render SiNRs suitable for a broad spectrum of applications, such as fieldeffect transistor, drug carrier, solar cell, nanomechanical device, and lithium-ion battery. However, studies aiming to identify a new synthetic method and apply ...

Quantum confinement effect of two-dimensional all-inorganic halide perovskites

Quantum confinement effect (QCE), an essential physical phenomenon of semiconductors when the size becomes comparable to the exciton Bohr radius, typically results in quite different physical properties of low-dimensional materials from their bulk counterparts and can be exploited to enhance the device performance in various optoelectronic applications. Here, taking CsPbBr3 as an ...

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Exploring and designing bi-functional catalysts with earth-abundant elements that can work well for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline medium are of significance for producing clean fuel to relieve energy and environment crisis. Here, a novel Ni/NiO monolithic electrode was developed by a facile and cost-effective acid promoted ...

Design and tailoring of patterned ZnO nanostructures for energy conversion applications

ZnO is a typical direct wide-bandgap semiconductor material, which has various morphologies and unique physical and chemical properties, and is widely used in the fields of energy, information technology, biomedicine, and others. The precise design and controllable fabrication of nanostructures have gradually become important avenues to further enhancing the performance of ...

Uptake of magnetic nanoparticles for adipose-derived stem cells with multiple passage numbers

With the increasingly promising role of nanomaterials in tissue engineering and regenerative medicine, the interaction between stem cells and nanoparticles has become a critical focus. The entry of nanoparticles into cells has become a primary issue for effectively regulating the subsequent safety and performance of nanomaterials in vivo. Although the influence of nanomaterials on ...

Advanced carbon materials for flexible and wearable sensors

Flexible and wearable sensors have drawn extensive concern due to their wide potential applications in wearable electronics and intelligent robots. Flexible sensors with high sensitivity, good flexibility, and excellent stability are highly desirable for monitoring human biomedical signals, movements and the environment. The active materials and the device structures are the keys ...

Microfluidic generation of Buddha beads-like microcarriers for cell culture

The fabrication of functional microcarriers capable of achieving in vivo-like three-dimensional cell culture is important for many tissue engineering applications. Here, inspired by the structure of Buddha beads, which are generally composed of moveable beads strung on a rope, we present novel cell microcarriers with controllable macropores and heterogeneous microstructures by ...

A novel lithium-ion battery comprising Li-rich@Cr2O5 composite cathode and Li4Ti5O12 anode with controllable coulombic efficiency

Through meticulous design, a Li-lacking Cr2O5 cathode is physically mixed with Li-rich Li1.2Ni0.13Co0.13Mn0.54O2 (LNCM) cathode to form composite cathodes LNCM@xCr2O5 (x = 0, 0.1, 0.2, 0.3, 0.35, 0.4, mass ratio) in order to make use of the excess lithium produced by the Li-rich component in the first charge-discharge process. The initial coulombic efficiency (ICE) of LNCM ...

“Petal effect”-inspired superhydrophobic and highly adhesive coating on magnesium with enhanced corrosion resistance and biocompatibility

With properties of complete degradation and favorable mechanical behavior, Mg and its alloys are regarded as the next generation medical metal materials. However, fast degradation and poor surface biocompatibility hinder their clinical applications. Inspired by the “petal effect”, we successfully constructed a superhydrophobic and highly adhesive coating on pure Mg via a simple ...

Enhanced performance of solar cells via anchoring CuGaS2 quantum dots

Ternary I–III–VI quantum dots (QDs) of chalcopyrite semiconductors exhibit excellent optical properties in solar cells. In this study, ternary chalcopyrite CuGaS2 nanocrystals (2–5 nm) were one-pot anchored on TiO2 nanoparticles (TiO2@CGS) without any long ligand. The solar cell with TiO2@CuGaS2/N719 has a power conversion efficiency of 7.4%, which is 23% higher than that of ...

Design and synthesis of low band gap non-fullerene acceptors for organic solar cells with impressively high J sc over 21 mA cm_2

Three low bandgap non-fullerene acceptors based on thieno[3,2-b]thiophene fused core with different ending groups, named TTIC-M, TTIC, TTIC-F were designed and synthesized. Using a wide bandgap polymer PBDB-T as donor to form a complementary absorption in the range of 300–900 nm, high efficencies of 9.97%, 10.87% and 9.51% were achieved for TTIC-M, TTIC and TTFC-F based ...

Atomic layer reversal on CeO2 (100) surface

The structure and properties of CeO2 surfaces have been intensively studied due to their importance in a lot of surface-related applications. Since most of surface techniques probe the structure information inside the outermost surface plane, the subsurface structure information has been elusive in many studies. Using the profile imaging with aberration-corrected transmission ...

A novel bone marrow targeted gadofullerene agent protect against oxidative injury in chemotherapy

Chemotherapy as an effective cancer treatment technique has been widely used in tumor therapy. However, it is still a challenge to overcome the serious side effects of chemotherapy, especially for its myelotoxicity. Here we report a novel strategy using the water soluble gadofullerene nanocrystals (GFNCs) to protect against chemotherapy injury in hepatocarcinoma bearing mice, which ...

Facile synthesis of T-Nb2O5 nanosheets/nitrogen and sulfur co-doped graphene for high performance lithium-ion hybrid supercapacitors

Li-ion hybrid supercapacitors (Li-HSCs) have attracted increasing attention as a promising energy storage device with both high power and energy densities. We report a facile two-step hydrothermal method to prepare the orthorhombic niobium oxide (T-Nb2O5) nanosheets supported on nitrogen and sulfur co-doped graphene (T-Nb2O5/NS-G) as anode for Li-HSCs. X-ray diffraction and ...

Monitoring magnesium degradation using microdialysis and fabric-based biosensors

This paper describes the development of a monitoring system capable of detecting the concentration of magnesium ions (Mg2+) released during the degradation of magnesium implants. The system consists of a microdialysis probe that samples fluid adjacent to the implant and a catalytic biosensor specific to Mg2+ ions. The biosensor was fabricated on a cotton fabric platform, in which a ...

Synthesis of single-crystal hyperbranched rhodium nanoplates with remarkable catalytic properties

The catalytic properties of noble metal nanocrystals can be tuned via engineering their structures. Nanocrystals with fractal structures are fascinating catalysts regarding their large surface area-to-volume ratios, large numbers of edges and corners, which can be tuned simultaneously by their hierarchical ordering. However, it is still a great challenge to control the hierarchical ...

A new two-dimensional TeSe2 semiconductor: indirect to direct band-gap transitions

A novel two-dimensional (2D) TeSe2 structure with high stability is predicted based on the first-principles calculations. As a semiconductor, the results disclose that the monolayer TeSe2 has a wide-band gap of 2.392 eV. Interestingly, the indirect-band structure of the monolayer TeSe2 transforms into a direct-band structure under the wide biaxial strain (0.02–0.12). The lower hole ...

Rectangular flake-like mesoporous NiCo2O4 as enzyme mimic for glucose biosensing and biofuel cell

The rectangular flake-like mesoporous NiCo2O4 (meso-NiCo2O4) catalysts were first used in glucose bio-sensing and glucose biofuel cell (GBFC) as an enzyme mimic simultaneously. The meso-NiCo2O4 displayed excellent catalytic capability to glucose including a super-fast response time (within 1 s), a super-high sensitivity (662.31 μA (mmol L−1)−1 cm−2), and a super-low detection limit ...

In vitro degradation and biocompatibility of Mg-Li-Ca alloys—the influence of Li content

Mg-Li based alloys hold much attention as potential biomedical materials due to their excellent ductility. A reduced mechanical strength and concern for biocompatibility are exhibited for Mg-Li binary alloys due to the presence of Li element. Addition of the Ca element into Mg-Li alloys leads to an improvement in mechanical strength and biocompatibility. In the present work, the ...

Environmentally-friendly solvent processed fullerene-free organic solar cells enabled by screening halogen-free solvent additives

Though the power conversion efficiencies (PCEs) of organic solar cells (OSCs) have been boosted to 12%, the use of highly pollutive halogenated solvents as the processing solvent significantly hinders the mass production of OSCs. It is thus necessary to achieve high-efficiency OSCs by utilizing the halogen-free and environmentally-friendly solvents. Herein, we applied a ...

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 ...

Structure and electrochemical performance of BaLi2−x Na x Ti6O14 (0≤x≤2) as anode materials for lithium-ion battery

A series of BaLi2−x Na x Ti6O14(0≤x≤2) compounds as lithium storage materials were synthesized by a facile solid-state method. X-ray diffraction Rietveld refinement shows that the Bragg positions correspond to the BaLi2Ti6O14, indicating a successful preparation. The Na+ ions doped BaLi2-Ti6O14 compounds have larger unit-cell volume than the pristine one because ionic radius of Na+ ...