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Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

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https://www.readbyqxmd.com/read/27981015/transition-metal-involved-photon-upconversion
#1
Shi Ye, En-Hai Song, Qin-Yuan Zhang
Upconversion (UC) luminescence of lanthanide ions (Ln(3+)) has been extensively investigated for several decades and is a constant research hotspot owing to its fundamental significance and widespread applications. In contrast to the multiple and fixed UC emissions of Ln(3+), transition metal (TM) ions, e.g., Mn(2+), usually possess a single broadband emission due to its 3d(5) electronic configuration. Wavelength-tuneable single UC emission can be achieved in some TM ion-activated systems ascribed to the susceptibility of d electrons to the chemical environment, which is appealing in molecular sensing and lighting...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981014/variation-in-carbohydrates-between-cancer-and-normal-cell-membranes-revealed-by-super-resolution-fluorescence-imaging
#2
Junling Chen, Tianzhou Liu, Jing Gao, Lan Gao, Lulu Zhou, Mingjun Cai, Yan Shi, Wenyong Xiong, Junguang Jiang, Ti Tong, Hongda Wang
Carbohydrate alterations on cell membranes are associated with various cancer processes, including tumorigenesis, malignant transformation, and tumor dissemination. However, variations in the distributions of cancer-associated carbohydrates are unclear at the molecular level. Herein, direct stochastic optical reconstruction microscopy is used to reveal that seven major types of carbohydrates tended to form obvious clusters on cancer cell membranes compared with normal cell membranes (both cultured and primary cells), and most types of carbohydrates present a similar distributed characteristic on various cancer cells (e...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981013/plga-pnipam-microspheres-loaded-with-the-gastrointestinal-nutrient-nab-ameliorate-cardiac-dysfunction-by-activating-sirt3-in-acute-myocardial-infarction
#3
Panke Cheng, Wen Zeng, Li Li, Da Huo, Lingqing Zeng, Ju Tan, Jingting Zhou, Jiansen Sun, Ge Liu, Yanzhao Li, Ge Guan, Yuxin Wang, Chuhong Zhu
Acute myocardial infarction (AMI) is the death of cardiomyocytes caused by a lack of energy due to ischemia. Nutrients supplied by the blood are the main source of cellular energy for cardiomyocytes. Sodium butyrate (NaB), a gastrointestinal nutrient, is a short-chain fatty acid (butyric acid) that may act as an energy source in AMI therapy. Poly(lactic-co-glycolic acid)-Poly (N-isopropylacrylamide) microspheres loaded with NaB (PP-N) are synthesized to prolong the release of NaB and are injected into ischemic zones in a Sprague-Dawley rat AMI model...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981012/plasmonic-nanoparticles-with-quantitatively-controlled-bioconjugation-for-photoacoustic-imaging-of-live-cancer-cells
#4
Chao Tian, Wei Qian, Xia Shao, Zhixing Xie, Xu Cheng, Shengchun Liu, Qian Cheng, Bing Liu, Xueding Wang
Detection and imaging of single cancer cells is critical for cancer diagnosis and understanding of cellular dynamics. Photoacoustic imaging (PAI) provides a potential tool for the study of cancer cell dynamics, but faces the challenge that most cancer cells lack sufficient endogenous contrast. Here, a type of colloidal gold nanoparticles (AuNPs) are physically fabricated and are precisely functionalized with quantitative amounts of functional ligands (i.e., polyethyleneglycol (PEG) and (Arginine(R)-Glycine(G)-Aspartic(D))4 (RGD) peptides) to serve as an exogenous contrast agent for PAI of single cells...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981011/graphene-oxide-based-sensor-for-ultrasensitive-visual-detection-of-fluoride
#5
Tapas K Mandal, Yi Hou, Zhenyu Gao, Haoran Ning, Wensheng Yang, Mingyuan Gao
Visual fluoride ion detection with a detection limit down to pmol L(-1) is achieved through quenching/reactivating the fluorescence of N-doped graphene oxide.
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981010/the-mechanism-of-the-interfacial-charge-and-mass-transfer-during-intercalation-of-alkali-metal-cations
#6
Edgar Ventosa, Bianca Paulitsch, Philipp Marzak, Jeongsik Yun, Florian Schiegg, Thomas Quast, Aliaksandr S Bandarenka
Intercalation of alkali metal cations, like Li(+) or Na(+), follows the same three-stage mechanism of the interfacial charge and mass transfer irrespective of the nature of the electrolyte, electrolyte composition or electrode material.
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981009/guidable-thermophoretic-janus-micromotors-containing-gold-nanocolorifiers-for-infrared-laser-assisted-tissue-welding
#7
Wenping He, Johannes Frueh, Narisu Hu, Liping Liu, Meiyu Gai, Qiang He
Current wound sealing systems such as nanoparticle-based gluing of tissues allow almost immediate wound sealing. The assistance of a laser beam allows the wound sealing with higher controllability due to the collagen fiber melting which is defined by loss of tertiary protein structure and restoration upon cooling. Usually one employs dyes to paint onto the wound, if water absorption bands are absent. In case of strong bleeding or internal wounds such applications are not feasible due to low welding depth in case of water absorption bands, dyes washing off, or the dyes becoming diluted within the wound...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981008/booming-development-of-group-iv-vi-semiconductors-fresh-blood-of-2d-family
#8
Xing Zhou, Qi Zhang, Lin Gan, Huiqiao Li, Jie Xiong, Tianyou Zhai
As an important component of 2D layered materials (2DLMs), the 2D group IV metal chalcogenides (GIVMCs) have drawn much attention recently due to their earth-abundant, low-cost, and environmentally friendly characteristics, thus catering well to the sustainable electronics and optoelectronics applications. In this instructive review, the booming research advancements of 2D GIVMCs in the last few years have been presented. First, the unique crystal and electronic structures are introduced, suggesting novel physical properties...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981007/chloride-reinforced-carbon-nanofiber-host-as-effective-polysulfide-traps-in-lithium-sulfur-batteries
#9
Lei Fan, Houlong L Zhuang, Kaihang Zhang, Valentino R Cooper, Qi Li, Yingying Lu
Lithium-sulfur (Li-S) battery is one of the most promising alternatives for the current state-of-the-art lithium-ion batteries due to its high theoretical energy density and low production cost from the use of sulfur. However, the commercialization of Li-S batteries has been so far limited to the cyclability and the retention of active sulfur materials. Using co-electrospinning and physical vapor deposition procedures, we created a class of chloride-carbon nanofiber composites, and studied their effectiveness on polysulfides sequestration...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981006/enabling-the-triplet-of-tetraphenylethene-to-sensitize-the-excited-state-of-europium-iii-for-protein-detection-and-time-resolved-luminescence-imaging
#10
Zece Zhu, Bo Song, Jingli Yuan, Chuluo Yang
A tetraphenylethene (TPE) group that exhibits aggregation-induced emission is incorporated into the ligand of a Eu(III) complex (TPEEu) to sensitize the excited state of Eu(III). In steady-state measurements, TPEEu exhibits weak luminescence when dissolved in aqueous solutions even at a high concentration level, but emits strong fluorescence of TPE and phosphorescence of Eu(III) upon binding with bovine serum albumin. With a delay time of 0.05 ms and a gate time of 1.0 ms in time-resolved measurements, only phosphorescent emission of Eu(III) is observed with a high on/off ratio...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981005/human-like-sensing-and-reflexes-of-graphene-based-films
#11
Qin Zhang, Lifang Tan, Yunxu Chen, Tao Zhang, Wenjie Wang, Zhongfan Liu, Lei Fu
Humans have numerous senses, wherein vision, hearing, smell, taste, and touch are considered as the five conventionally acknowledged senses. Triggered by light, sound, or other physical stimulations, the sensory organs of human body are excited, leading to the transformation of the afferent energy into neural activity. Also converting other signals into electronical signals, graphene-based film shows its inherent advantages in responding to the tiny stimulations. In this review, the human-like senses and reflexes of graphene-based films are presented...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981004/single-crystal-sub-nanometer-sized-cu6-sr-6-clusters-structure-photophysical-properties-and-electrochemical-sensing
#12
Xiaohui Gao, Shuijian He, Chunmei Zhang, Cheng Du, Xi Chen, Wei Xing, Shengli Chen, Andre Clayborne, Wei Chen
Organic ligand-protected metal nanoclusters have attracted extensively attention owing to their atomically precise composition, determined atom-packing structure and the fascinating properties and promising applications. To date, most research has been focused on thiol-stabilized gold and silver nanoclusters and their single crystal structures. Here the single crystal copper nanocluster species (Cu6(SC7H4NO)6) determined by X-ray crystallography and mass spectrometry is presented. The hexanuclear copper core is a distorted octahedron surrounded by six mercaptobenzoxazole ligands as protecting units through a simple bridging bonding motif...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981003/symmetric-electrodes-for-electrochemical-energy-storage-devices
#13
Lei Zhang, Shi Xue Dou, Hua Kun Liu, Yunhui Huang, Xianluo Hu
Increasing environmental problems and energy challenges have so far attracted urgent demand for developing green and efficient energy-storage systems. Among various energy-storage technologies, sodium-ion batteries (SIBs), electrochemical capacitors (ECs) and especially the already commercialized lithium-ion batteries (LIBs) are playing very important roles in the portable electronic devices or the next-generation electric vehicles. Therefore, the research for finding new electrode materials with reduced cost, improved safety, and high-energy density in these energy storage systems has been an important way to satisfy the ever-growing demands...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981002/boron-substituted-na3v2-p1-x-b-x-o4-3-cathode-materials-with-enhanced-performance-for-sodium-ion-batteries
#14
Pu Hu, Xiaofang Wang, Tianshi Wang, Lanli Chen, Jun Ma, Qingyu Kong, Siqi Shi, Guanglei Cui
The development of excellent performance of Na-ion batteries remains great challenge owing to the poor stability and sluggish kinetics of cathode materials. Herein, B substituted Na3V2P3-x B x O12 (0 ≤ x ≤ 1) as stable cathode materials for Na-ion battery is presented. A combined experimental and theoretical investigations on Na3V2P3-x B x O12 (0 ≤ x ≤ 1) are undertaken to reveal the evolution of crystal and electronic structures and Na storage properties associated with various concentration of B. X-ray diffraction results indicate that the crystal structure of Na3V2P3-x B x O12 (0 ≤ x ≤ 1/3) consisted of rhombohedral Na3V2(PO4)3 with tiny shrinkage of crystal lattice...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981001/capacity-fade-analysis-of-sulfur-cathodes-in-lithium-sulfur-batteries
#15
Jianhua Yan, Xingbo Liu, Bingyun Li
Rechargeable lithium-sulfur (Li-S) batteries are receiving ever-increasing attention due to their high theoretical energy density and inexpensive raw sulfur materials. However, their rapid capacity fade has been one of the key barriers for their further improvement. It is well accepted that the major degradation mechanisms of S-cathodes include low electrical conductivity of S and sulfides, precipitation of nonconductive Li2S2 and Li2S, and poly-shuttle effects. To determine these degradation factors, a comprehensive study of sulfur cathodes with different amounts of electrolytes is presented here...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27981000/the-role-of-local-triplet-excited-states-and-d-a-relative-orientation-in-thermally-activated-delayed-fluorescence-photophysics-and-devices
#16
Fernando B Dias, Jose Santos, David R Graves, Przemyslaw Data, Roberto S Nobuyasu, Mark A Fox, Andrei S Batsanov, Tiago Palmeira, Mário N Berberan-Santos, Martin R Bryce, Andrew P Monkman
Here, a comprehensive photophysical investigation of a the emitter molecule DPTZ-DBTO2, showing thermally activated delayed fluorescence (TADF), with near-orthogonal electron donor (D) and acceptor (A) units is reported. It is shown that DPTZ-DBTO2 has minimal singlet-triplet energy splitting due to its near-rigid molecular geometry. However, the electronic coupling between the local triplet ((3)LE) and the charge transfer states, singlet and triplet, ((1)CT, (3)CT), and the effect of dynamic rocking of the D-A units about the orthogonal geometry are crucial for efficient TADF to be achieved...
December 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27980999/anti-metastatic-and-anti-angiogenic-activities-of-core-shell-sio2-ldh-loaded-with-etoposide-in-non-small-cell-lung-cancer
#17
Yanjing Zhu, Rongrong Zhu, Mei Wang, Bin Wu, Xiaolie He, Yechang Qian, Shilong Wang
Currently, nanoparticles have gained a great attention in the anti-tumor research area. However, to date, studies on the anti-metastasis action of core-shell SiO2@LDH (LDH: layered double hydroxide) nanoparticles remain untouched. Two emerging aspects considered are establishing research on the controlling delivery effect of SiO2@LDH combined with anti-cancer medicine from a new perspective. The fine properties synthetic SiO2@LDH-VP16 (VP16: etoposide) are practiced to exhibit the nanoparticle's suppression on migration and invasion of non-small cell lung cancer (NSCLC)...
November 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27980998/a-flexible-platform-containing-graphene-mesoporous-structure-and-carbon-nanotube-for-hydrogen-evolution
#18
Rujing Zhang, Xiao Li, Li Zhang, Shuyuan Lin, Hongwei Zhu
It is of great significance to design a platform with large surface area and high electrical conductivity for poorly conductive catalyst for hydrogen evolution reaction (HER), such as molybdenum sulfide (MoS x ), a promising and cost-effective nonprecious material. Here, the design and preparation of a free-standing and tunable graphene mesoporous structure/single-walled carbon nanotube (GMS/SWCNT) hybrid membrane is reported. Amorphous MoS x is electrodeposited on this platform through a wet chemical process under mild temperature...
November 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27980997/encoding-magnetic-states-in-monopole-like-configurations-using-superconducting-dots
#19
Anna Palau, Sergio Valencia, Nuria Del-Valle, Carles Navau, Matteo Cialone, Ashima Arora, Florian Kronast, D Alan Tennant, Xavier Obradors, Alvaro Sanchez, Teresa Puig
A large manifold of nontrivial spin textures, including the stabilization of monopole-like fields, are generated by using a completely new and versatile approach based on the combination of superconductivity and magnetism. Robust, stable, and easily controllable complex spin structures are encoded, modified, and annihilated in a continuous magnetic thin film by defining a variety of magnetic states in superconducting dots.
November 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27980996/ultrasensitive-luminescent-in-vitro-detection-for-tumor-markers-based-on-inorganic-lanthanide-nano-bioprobes
#20
Wei Zheng, Shanyong Zhou, Jin Xu, Yongsheng Liu, Ping Huang, Yan Liu, Xueyuan Chen
Ultrasensitive and accurate detection of tumor markers is of vital importance for the screening or diagnosis of cancers at their early stages and for monitoring cancer relapse after surgical resection. Inorganic lanthanide (Ln(3+)) nanoparticles (NPs), owing to their superior physicochemical characteristics, are regarded as a new generation of luminescent nano-bioprobes in the field of cancer diagnosis and therapy. In this progress report, a focus is set on our recent efforts on the development of inorganic Ln(3+)-NPs as efficient luminescent nano-bioprobes for the ultrasensitive in vitro biodetection of tumor markers, with an emphasis on the dissolution-enhanced luminescent bioassay (DELBA), an emerging technique recently developed toward practical medical applications...
November 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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