宋元元的个人博客分享 http://blog.sciencenet.cn/u/pfdragon 我不是嘲风,我仅仅代表自己,我不代表嘲风; 我是嘲风,我用我的生命浇灌嘲风,直至生命竭尽。

博文

2013年静远嘲风封面合集(四)

已有 856 次阅读 2022-11-11 15:07 |个人分类:作品发表|系统分类:论文交流

▲ Vol 25 Issue 25 | July 05, 2013

Organic Transistors: High Performance Field-Effect Ammonia Sensors Based on a Structured Ultrathin Organic Semiconductor Film (Adv. Mater. 25/2013)

Liqiang Li,Peng Gao,Martin Baumgarten,Klaus Müllen,Nan Lu,Harald Fuchs,Lifeng Chi

Gas sensors based on organic field-effect transistors (OFETs) may enable a broad range of monitoring applications. Growth of ultrathin and microstructured organic semiconductor film is an efficient way to realize high performance OFET-based sensors. On page 3419, Lifeng Chi, Klaus Müllen and co-workers demonstrate high performance OFET-based ammonia sensors with ultrathin (4-6 molecular layers) dendritic organic semiconductor microstripes prepared via dip-coating.

https://onlinelibrary.wiley.com/doi/10.1002/adma.201370163

▲ Vol 42 Issue 14 | July 21, 2013

Nanomaterials with enzyme-like characteristics (nanozymes): next-generation artificial enzymes

Hui Wei and Erkang Wang

Over the past few decades, researchers have established artificial enzymes as highly stable and low-cost alternatives to natural enzymes in a wide range of applications. A variety of materials including cyclodextrins, metal complexes, porphyrins, polymers, dendrimers and biomolecules have been extensively explored to mimic the structures and functions of naturally occurring enzymes. Recently, some nanomaterials have been found to exhibit unexpected enzyme-like activities, and great advances have been made in this area due to the tremendous progress in nano-research and the unique characteristics of nanomaterials. To highlight the progress in the field of nanomaterial-based artificial enzymes (nanozymes), this review discusses various nanomaterials that have been explored to mimic different kinds of enzymes. We cover their kinetics, mechanisms and applications in numerous fields, from biosensing and immunoassays, to stem cell growth and pollutant removal. We also summarize several approaches to tune the activities of nanozymes. Finally, we make comparisons between nanozymes and other catalytic materials (other artificial enzymes, natural enzymes, organic catalysts and nanomaterial-based catalysts) and address the current challenges and future directions (302 references).

http://pubs.rsc.org/en/content/articlelanding/2013/cs/c3cs35486e#!divAbstract

▲ Vol 09 Issue 09-10 | May 27, 2013

Proteins: Biosafety and Bioapplication of Nanomaterials by Designing Protein–Nanoparticle Interactions (Small 9–10/2013)

Sheng-Tao Yang,Ying Liu,Yan-Wen Wang,Aoneng Cao

When nanomaterials (NMs) enter biosystems, they interact with various biomolecules, especially proteins, forming a protein corona on the surface. Understanding how nanoparticles (NPs) interact with proteins is crucial for bioapplications and for the biosafety of NMs. On page 1635, A. Cao and co-workers summarize the current understanding of protein–NP interactions. Guidelines for improving bioapplication performance and reducing the potential biosafety hazard of NMs by designing the protein–NP interactions are discussed, along with future directions and challenges in this exciting field.

https://onlinelibrary.wiley.com/doi/10.1002/smll.201370053


▲ Vol 01 Issue 23 |  June 21, 2013

Origin of the half-metallic properties of graphitic carbon nitride in bulk and confined forms

Yang Li, Stefano Sanvito and  Shimin Hou

The electronic and magnetic properties of graphitic carbon nitride (g-C4N3) in both its bulk and confined form are investigated by using density functional theory. Our calculations show that the 2pz orbital of the carbon atoms connecting the sym-triazine structure units plays a decisive role in the half-metallic character of these materials. In the bulk two-dimensional (2D) case, the 2pz orbital of the connecting carbon atom couples weakly with the frontier molecular orbitals of the sym-triazine ring due to symmetry mismatch and a large energy separation. As a consequence a narrow energy band is formed near the Fermi level. This spin splits in virtue of the Stoner criterion and thereby gives rise to spin polarization in the (1 × 1) primitive cell. Such a magnetic state is not destroyed by a (2 × 2) reconstruction, which further enhances the half-metallic character of the 2D g-C4N3 sheet. When the dimension is reduced, size and edge effects become dominant. Both zigzag and armchair one-dimensional g-C4N3 nanoribbons with H-terminated edges preserve the half-metallicity, at least down to a critical ribbon width. Furthermore, the electronic and magnetic properties of these g-C4N3 nanoribbons can be tuned by controlling the π-type coupling between the passivating functional groups and the 2pz orbital of the connecting carbon atoms at the ribbon edges, demonstrating that g-C4N3 may be an interesting material platform for applications in future spintronic devices.

http://pubs.rsc.org/en/content/articlelanding/2013/tc/c3tc30371c#!divAbstract


▲ Vol 30 Issue 04 |  April , 2013

Batteries: Encapsulation of Sulfur in a Hollow Porous Carbon Substrate for Superior Li-S Batteries with Long Lifespan (Part. Part. Syst. Charact. 4/2013) (page 392)

Sen Xin, Ya-Xia Yin, Li-Jun Wan and Yu-Guo Guo

Hollow carbon particles with hierarchically porous structure are prepared via a simple hydrothermal method with sulfonated polystyrene spheres as templates. Sulfur-carbon composite particles with high lithium electroactivity and excellent cycling stability are obtained by encapsulating chainlike sulfur molecules into the carbon particles, which promises an advanced Li-S battery with long lifespan as presented by Yu-Guo Guo and co-workers on page 321.

http://onlinelibrary.wiley.com/doi/10.1002/ppsc.v30.4/issuetoc


▲ Vol 15 Issue 18 |  May 14 , 2013

BETS3[Cu2(C2O4)3](CH3OH)2: an organic–inorganic hybrid antiferromagnetic metal (BETS = bisethylene(tetraselenfulvalene))

Bin Zhang, Yan Zhang, Zheming Wang, Song Gao, Yanjun Guo, Fen Liu and  Daoben Zhu

The organic–inorganic hybrid charge-transfer salt of BETS and a two-dimensional oxalate–metalate: BETS3[Cu2(C2O4)3](CH3OH)2 (1) was obtained by the electrochemical oxidation of neutral BETS in the presence of [(C2H5)3NH]2Cu(C2O4)2 in a C6H5Cl–CH3OH solution. 1 crystallizes in a triclinic crystal system with cell parameters: a = 8.7716(3) Å, b = 16.9903(6) Å, c = 20.5716(7) Å, α = 104.794(2)°, β = 102.209(2)°, γ = 92.243(2)°, V = 2883.1(2) Å3 and P1 in 293 K. Donor layers and Jahn–Teller distorted honeycomb anions stack alternatively along the c axis in 1. The crystal structure of 1 is similar to the reported compound [BEDT–TTF]3[Cu2(C2O4)3](CH3OH)2 (BEDT–TTF = bis(ethylene-dithio)tetrathiafulvalene, ET). Compared with the BEDT–TTF salt, the c axis expands by 2.3% at room temperature, the shorter interaction between the donor molecules increases, the room temperature conductivity increases from 4 S cm−1 to 140 S cm−1 and the antiferromagnetic interaction between the metal atoms with Jahn–Teller distortion through the oxalato-bridge enhances.

http://pubs.rsc.org/en/content/articlelanding/2013/ce/c2ce26552d#!divAbstract


▲ Vol 01 Issue 46 |  December 14 2013

Functionalized selenium nanoparticles with nephroprotective activity, the important roles of ROS-mediated signaling pathways

Yinghua Li,Xiaoling Li,  Wenjie Zheng, Cundong Fan, Yibo Zhang and  Tianfeng Chen

The most frequent adverse effect of cisplatin-based chemotherapy is nephrotoxicity. Oxidative stress has been implicated as an important mechanism in the pathogenesis of cisplatin-induced nephrotoxicity. In the present study, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (trolox) surface-functionalized selenium nanoparticles (Se@Trolox) with enhanced antioxidant activity have been prepared by self-assembly of trolox on the surface of the nanoparticles, and their nephroprotective effects have been investigated. Functionalization by trolox significantly enhanced cell uptake and in vitro antioxidant activities of the nanoparticles. In addition, pretreatment with Se@Trolox dose-dependently blocked cisplatin-induced cell growth inhibition against HK-2 cells. Mechanistic investigation suggested that Se@Trolox markedly prevented cisplatin-induced apoptosis in HK-2 cells, as evidenced by inhibition of chromatin condensation, DNA fragmentation, PARP cleavage and activation of caspase-3. Furthermore, Se@Trolox effectively blocked the cisplatin-induced reactive oxygen species (ROS) accumulation, activation of AKT and MAPK signaling and DNA damage-mediated p53 phosphorylation in HK-2 cells. Taken together, our findings suggest that Se@Trolox is a promising Se species with potential application in prevention of cisplatin-induced renal injury.

http://pubs.rsc.org/en/content/articlelanding/2013/tb/c3tb21168a#!divAbstract

▲ Vol 01 Issue 26 |  July 14 2013

Molecular structure matters: PEG-b-PLA nanoparticles with hydrophilicity and deformability demonstrate their advantages for high-performance delivery of anti-cancer drugs

Zhanguo Yue,Zuoxiang You,Qinzheng Yang,Piping Lv,Hua Yue,Bin Wang,Dezhi Ni,Zhiguo Su,Wei Wei and  Guanghui Ma

Various carriers are being advanced for anti-cancer therapy, which can protect drugs and ferry them to the target site. However, little understanding exists regarding the effect of molecular structure on anti-cancer drug delivery efficiency. To fill this knowledge gap, we take poly(lactic acid) (PLA), poly(lactide-co-glycolide) (PLGA), and poly-ethylene glycol-co-poly-lactide (PEG-b-PLA) polymers as prototype materials and comparatively explore the inherent relationship between the molecular structure and the delivery ability. Compared with PLA and PLGA NPs, PEG-b-PLA ones possess the advantages of longer blood circulation time, more tumor accumulation, and better intratumoral delivery ability. Subsequent mechanism investigations reveal that the molecular structure will regulate the polymer arrangement and render NPs different hydrophilicity/deformability, which dictate the distinct delivery performances. Finally, the superior PEG-b-PLA NPs are further loaded with the anti-cancer drug paclitaxel (PTX) and functionalized with magnetic (M) Fe3O4 nanocrystals. As-designed PTX/M PEG-b-PLA NPs show much better tumor inhibition efficacy and fewer side effects than the commercialized Taxol® formulation, strongly supporting their use as high-performance carriers for anti-cancer therapy.

http://pubs.rsc.org/en/content/articlelanding/2013/tb/c3tb20406e#!divAbstract


▲ Vol 01 Issue 09 |  September  2013

Traceless protein delivery with an efficient recyclable nanocarrier

Xuanjun Wu, Yunlong Song, Jiahuai Han, Liu Yang and  Shoufa Han

Intracellular delivery is a prerequisite for the efficacy of many pharmaceutical proteins. Herein, vitamin B6 (pyridoxal-5′-phosphate, PLP) functionalized calcium phosphate (CP) is used as the bio-recyclable nanocarrier for delivery of proteins into cells. Proteins could be loaded on/released from PLP-CP via formation/hydrolysis of pH sensitive aldimine bridging lysine and surface-displayed PLP. The loaded proteins could be delivered into the cytosol of HeLa, HepG2 and L929 cells where the carrier could be metabolized into endogenous metabolites of Ca2+, HPO42−, and vitamin B6. PLP-CP mediated cell transduction is 10–40 folds more efficient than TAT which is a widely used cell penetrating peptide, demonstrating the utility of PLP-CP as the traceless platform for high-efficiency delivery of proteins into mammalian cells.

http://pubs.rsc.org/en/content/articlelanding/2013/bm/c3bm60128e#!divAbstract


▲ Vol 05 Issue 13 |  July 07 2013

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

Da Zhong, Qinglin Yang, Lin Guo, Shixue Dou, Kesong Liu, Lei Jiang

Multifunctional integration is an inherent characteristic for biological materials with multiscale structures. Learning from nature is an effective approach for scientists and engineers to construct multifunctional materials. In nature, mollusks (abalone), mussels, and the lotus have evolved different and optimized solutions to survive. Here, bio-inspired multifunctional graphene composite paper was fabricated in situ through the fusion of the different biological solutions from nacre (brick-and-mortar structure), mussel adhesive protein (adhesive property and reducing character), and the lotus leaf (self-cleaning effect). Owing to the special properties (self-polymerization, reduction, and adhesion), dopamine could be simultaneously used as a reducing agent for graphene oxide and as an adhesive, similar to the mortar in nacre, to crosslink the adjacent graphene. The resultant nacre-like graphene paper exhibited stable superhydrophobicity, self-cleaning, anti-corrosion, and remarkable mechanical properties underwater.

http://pubs.rsc.org/en/content/articlelanding/2013/nr/c3nr33632h#!divAbstract


▲ Vol 02 Issue 06 |  November 2013

Synthesis,protein delivery,and in vitro toxicity of a biodegradable poly(aminoester)

He Shen,Min Liu,Yu Chong,Jie Huang and  Zhijun Zhang

A hydrolytically degradable poly(amino ester) is synthesized and evaluated as a protein delivery vector in vitro. The poly(amino ester), with cleavable ester bonds, can degrade into nontoxic products both in vitro and in vivo under physiological conditions, exhibiting low toxicity. Our experiments reveal that the poly(amino ester) can efficiently condense proteins via electrostatic interaction, and is significantly less toxic than PEI 25 kDa. Using fluorescein isothiocyanate (FITC) labeled bovine serum albumin and ribonuclease A as model proteins, the degradable poly(amino ester) can efficiently deliver proteins into cells and regulate cell functions. These results suggest that the degradable poly(amino ester) is a promising and efficient protein delivery vector.

http://pubs.rsc.org/en/content/articlelanding/2013/tx/c3tx50074h#!divAbstract



▲ Vol 05 Issue 14 |  July 21 2013

Understanding the relationship of performance with nanofiller content in the biomimetic layered nanocomposites

Jianfeng Wang, Qunfeng Cheng, Ling Lin, Linfeng Chen, Lei Jiang

Montmorillonite/poly(vinyl alcohol) (MMT/PVA) nanocomposites spanning the complete range of MMT content (0–100 wt%) are prepared by simple evaporation-induced assembly. Effects of MMT content on the structure and mechanical properties of nanocomposites are systematically investigated and exhibit two important transitions at MMT contents of 30 wt% and 70 wt%. In the range of 0–30 wt%, the nanocomposites show a random structure. With the content of PVA increasing, the mechanical properties of the resultant nanocomposites were dramatically enhanced and were higher than that by prediction according to the conventional composite model. In the range of 30–70 wt%, the nanocomposites show a nacre-like layered structure with alternating MMT platelets and PVA layers, and all PVA is completely restricted by MMT platelets. The mechanical properties of nanocomposites were further improved by increasing the content of MMT, and reached the maximum value at the MMT content of 70 wt%. The 70 wt% MMT/PVA nanocomposite has a tensile strength of 219 ± 19 MPa, which is 5.5 times higher than that of a pure PVA film and surpasses nacre and reported biomimetic layered clay/PVA composites. When the MMT content is higher than 70 wt%, the layered structure is transformed to tactoids, which deteriorate mechanical properties. These results offer comprehensive understanding for developing high-performance biomimetic layered nanocomposite materials with high nanofiller loading.

http://pubs.rsc.org/en/content/articlelanding/2013/nr/c3nr00801k#!divAbstract

<静远嘲风动漫传媒科技中心>设计制作


b5272df5960f4b8b57631bc9272cc16.jpg

 

   购书链接:

科学的颜值:学术期刊封面故事及图像设计 

   https://item.jd.com/12802188.html

科技绘图/科研论文图/论文配图设计与创作自学手册:CorelDRAW篇 

   https://item.jd.com/13504674.html

科技绘图/科研论文图/论文配图设计与创作自学手册:Maya+PSP篇

   https://item.jd.com/13504686.html

科技绘图/科研论文图/论文配图设计与创作自学手册:科研动画篇

   https://item.jd.com/13048467.html#crumb-wrap



微信图片_20220509133450.jpg

640_wx_fmt=jpeg&wxfrom=5&wx_lazy=1&wx1.jpg

静远嘲风(MY Scimage) 成立于2007年,嘲风取自中国传统文化中龙生九子,子子不同的传说,嘲风为守护屋脊之瑞兽,喜登高望远;静远取自成语“宁静致远”,登高莫忘初心,远观而不可务远。

微信图片_20220512163044.jpg

微信图片_20220512163200.jpg

微信图片_20220512141415.jpg



https://m.sciencenet.cn/blog-519111-1363301.html

上一篇:爱思维尔数据下的全球科研之最 这9件事你知道吗?
下一篇:2013年静远嘲风封面合集(五)

0

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2023-1-29 20:54

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部