Science China Materials

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

List of Papers (Total 481)

Encapsulation of live cells by metal-organic frameworks for viability protection

In this study, a yeast@ZIF-8 core–shell composite material was successfully synthesized under room temperature in aqueous solution. The ZIF-8 shell endowed the inner yeast cells with a considerably extended lifetime without any nutrients at 4°C. Compared with the bare yeast cells, most coated yeast cells were kept alive even when cultured in zymolyase solution for 3 h...

Green synthesis of NiFe LDH/Ni foam at room temperature for highly efficient electrocatalytic oxygen evolution reaction

Clean energy technologies such as water splitting and fuel cells have been intensively pursued in the last decade for their free pollution. However, there is plenty of fossil energy consumed in the preparation of the catalysts, which results in a heavy pollution. Therefore, it is much desired but challenging to fabricate high-efficiency catalysts without extra energy input...

Self-recoverable semi-crystalline hydrogels with thermomechanics and shape memory performance

Stimuli-responsive hydrogels have become one of the most popular artificial soft materials due to their excellent adaption to complex environments. Thermoresponsive hydrogels triggered by temperature change can be efficiently utilized in many applications. However, these thermoresponsive hydrogels mostly cannot recover their mechanical states under large strain during the process...

Elucidating the dynamics of solvent engineering for perovskite solar cells

Researchers working in the field of photovoltaic are exploring novel materials for the efficient solar energy conversion. The prime objective of the discovery of every novel photovoltaic material is to achieve more energy yield with easy fabrication process and less production cost features. Perovskite solar cells (PSCs) delivering the highest efficiency in the passing years with...

Fast preparation route to high-performances textured Sr-doped Ca3Co4O9 thermoelectric materials through precursor powder modification

This work presents a short and very efficient method to produce high performance textured Ca3Co4O9 thermoelectric materials through initial powders modification. Microstructure has shown good grain orientation, and low porosity while slightly lower grain sizes were obtained in samples prepared from attrition milled powders. All samples show the high density of around 96% of the...

Facile fabrication of interconnected-mesoporous T-Nb2O5 nanofibers as anodes for lithium-ion batteries

Niobium pentoxide (Nb2O5) has been extensively studied as anode materials for lithium ion batteries (LIBs) due to its good rate performance and safety advantages. However, the intrinsic low electronic conductivity has largely restricted its practical application. In this work, we report the construction of mesoporous T-Nb2O5 nanofibers by electrospinning followed by heat...

Directly grown nanostructured electrodes for high-power and high-stability alkaline nickel/bismuth batteries

Bismuth oxide (Bi2O3) has received great attention as an anode material for alkaline nickel/bismuth (Ni/Bi) batteries due to its high theoretical capacity and easy preparation. However, the generally poor conductivity of metal oxides and the instability of Bi2O3 during cycling severely limit the device performance. Herein, we present the use of directly grown Bi2O3 nanoflake film...

A molecular-templating strategy to polyamine-incorporated porous organic polymers for unprecedented CO2 capture and separation

摘要本论文用简单、 通用的分子模板策略制备了具有极高CO2吸附与分离效率的多胺注入多孔有机聚合物(POPs). 在该策略中, CO2分子存在下, 多胺能均匀分散在母体多孔材料中. CO2模板分子能够产生有效的均匀分布孔, 能允许CO2分子进入但不允许其他较大分子如 N2和CH4进入. 在0.15 bar和323 K下, 制备的PPN-6/PEI-165展现出超高的4.52 mmol g−1 CO2吸附量且没有检测到N2和CH4吸附. 此外, 该材料对水汽稳定且温和条件(343K下真空)下易再生. 据我们所知, 该结果在迄今为止所报道的固体多孔吸附剂中有最好的CO2选择性捕获性能.

Dual upconversion nanophotoswitch for security encoding

Light-harvesting lanthanide ions (Ln3+) doped NaYF4 inks could provide polychromatic patterns for opposing counterfeiting commodity infestation because of their distinctive upconversion photoluminescence (UPL) properties. Herein, three kinds of core-triple-shell Ln3+ ions doped NaYF4 upconversion nanocrystals (UCNCs) are synthesized through modified high-temperature...

Promising cubic MnGeTe2 thermoelectrics

Semiconducting cubic group IV monotellurides, including PbTe and SnTe, have historically led most of the advancements in thermoelectrics. Recently, noncubic ones such as GeTe and MnTe have also shown to be promising, which motivates the current work focusing on the thermoelectric properties of MnGeTe2, a derivative compound of noncubic GeTe and MnTe but crystalizing in a cubic...

Hierarchical electrospun nanofibers treated by solvent vapor annealing as air filtration mat for high-efficiency PM2.5 capture

Recently, air pollution has become more serious and started to have a dramatic effect on the health of humans in many large cities. Generally, outdoor personal protection, such as commercial masks, cannot effectively prevent the inhalation of many pollutants. Particulate matter (PM) pollutants are a particularly serious threat to human health. Here we introduce a new efficient...

Controllable dispersion and reunion of liquid metal droplets

Liquid metal (LM) micro-droplets have been widely used in microfluidics, drug-loaded nano-system and micro-nano machine due to its excellent properties. However, there still exist difficulties in succinctly dispersing a bulk of LM into micro-droplets due to the large interfacial tension. Besides, the controllable switching between droplet dispersion and reunion is yet to be...

The influence of two-dimensional organic adlayer thickness on the ultralow frequency Raman spectra of transition metal dichalcogenide nanosheets

Recently, it has been reported that physisorbed adsorbates can be trapped between the bottom surface of two-dimensional (2D) materials and supported substrate to form 2D confined films. However, the influence of such 2D confined adsorbates on the properties of 2D materials is rarely explored. Herein, we combined atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM...

Solid-state yet flexible supercapacitors made by inkjet-printing hybrid ink of carbon quantum dots/graphene oxide platelets on paper

Paper-based flexible supercapacitors (SCs) show advantages due to the improved adhesion between paper and active materials, the simplified printing process and the lower cost, compared to other substrates such as plastics. Here we report the fabrication of solid-state yet flexible SCs by inkjetprinting a hybrid ink consisting of carbon quantum dots (CQDs) and graphene oxide (GO...

Functional molecular electronic devices through environmental control

摘要为了满足传统硅基电子器件日益微型化的需求, 科学家们前瞻性地提出了将单个分子或者分子聚集体夹在电极之间制备分子电子器件的前沿研究方向. 分子电子器件功能化的实现需要从分子工程、 界面工程以及材料工程的角度综合考虑. 本文总结了近期利用外界环境来调控分子电子器件功能的最新进展. 鉴于化学刺激所引起的显著效果, 作者展望了分子电子器件在单分子化学反应动力学中的应用前景以及未来的发展方向.

Sulfur/nickel ferrite composite as cathode with high-volumetric-capacity for lithium-sulfur battery

Low volumetric energy density is a bottleneck for the application of lithium-sulfur (Li-S) battery. The low-density sulfur cooperated with the light-weight carbon substrate realizes electrochemical cycle stability, but leads to worse volumetric energy density. Here, nickel ferrite (NiFe2O4)nanofibers as novel substrate for sulfur not only anchor lithium polysulfides to enhance...

Grain size adjustion in organic field-effect transistors for chemical sensing performance improvement

Various nanostructures of the organic semiconductor (OSC) films have been reported to enhance the organic field-effect transistors (OFETs) sensing performance. However, complicated fabrication processes hinder their applications. In this work, we have effectively enhanced the sensitivity of the OFET-based sensors only by adjusting substrate temperature in OSC preparation and...

A significant enhancement of catalytic performance by adjusting catalyst wettability

摘要固相材料的浸润性(包括亲水性、 疏水性、 亲油性和疏油性)已经成为设计与合成多相催化材料中必须要考虑的因素. 总结近年来的实验结果发现, 催化材料的浸润性对分子的扩散有显著影响, 适宜的浸润性与活性中心的协同是增强催化性能的关键, 这可以通过(i)有效富集反应物、 (ii)快速扩散产物、 (iii)促进形成反应中间体、 (iv)避免副反应和(v)提高催化材料结构等因素来提升多相催化材料的活性、 选择性和反应寿命, 这为设计与制备高效多相催化材料提供了新机遇.

Pt-Ni alloy catalysts for highly selective anti-Markovnikov alkene hydrosilylation

摘要铂基催化剂已广泛应用于烯烃的硅氢加成反应, 但贵金属铂因其稀有而价高, 成为其工业化应用的障碍. 为了降低成本和提高原子效率, 我们采用了廉价的镍金属来代替金属铂. 本文合成了一系列具有可调成分和形貌的双金属铂镍催化剂, 发现其在温和条件下对烯烃的硅氢加成反应表现出优越的活性和选择性. 此外, 还发现八面体的铂镍纳米合金不仅能应用于具有不同的官能团烯烃, 而且还有利于有机硅和硅烷偶联剂的绿色化学制备, 开发出更多的新产品.

Buildup of Sn@CNT nanorods by in-situ thermal plasma and the electronic transport behaviors

Monocrystal Sn nanorods encapsulated in the multi-walled carbon nanotubes (Sn@CNT NRs), were fabricated by a facile arc-discharge plasma process, using bulk Sn as the raw target and methane as the gaseous carbon source. The typical Sn@CNT NRs are 40–90 nm in diameter and 400–500 nm in length. The CNTs protect the inner Sn nanorods from oxidation. Temperature dependent I–V curve...

Combination of solution-phase process and halide exchange for all-inorganic, highly stable CsPbBr3 perovskite nanowire photodetector

The synthesis of high quality all-inorganic perovskite nanowires needs the harsh conditions, complex process and precision instruments, which are not beneficial to their extensive application. Here, all-inorganic perovskite cesium lead bromine (CsPbBr3) nanowires (NWs) are demonstrated with the combination of solution-phase process and halide exchange technology. A metal...

Quantum-confined superfluidics: From nature to artificial

Biological ion channels show that ultrafast ions and molecules transmission are in a quantum way of single molecular or ionic chain with a certain number of molecules or ions, and we define it as “quantum-confined superfluidics” (QSF). This ordered ultrafast flow in the confined channel can be considered as “quantum tunneling fluidics effect” with a “tunneling distance”, which is...