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Items from 1 to 20 out of 106 results

article

Joining Two Switches in One Nano‐Object: Photoacidity and Photoisomerization in Electrostatic Self‐Assembly

Alexander Zika, Mohit Agarwal, Ralf Schweins, Franziska Gröhn

Chemistry – A European Journal > 29 > 10 > n/a - n/a

Multi‐switchable supramolecular nano‐objects that respond to irradiation of different wavelengths with changes in size and shape have been built from two different water‐soluble molecular switches, joined by attachment to the same polyelectrolyte. Accordingly, two wavelength‐specific reactions, namely the excited‐state proton dissociation of a photoacid and the cis–trans isomerization of an azo dye,...

article

Small‐Molecule‐based Supramolecular Plastics Mediated by Liquid‐Liquid Phase Separation**

Jingjing Yu, Dawei Qi, Ermei Mäkilä, Lippo Lassila, more

Angewandte Chemie > 134 > 39 > n/a - n/a

Plastics are one of the most widely used polymeric materials. However, they are often undegradable and non‐recyclable due to the very stable covalent bonds of macromolecules, causing environmental pollution and health problems. Here, we report that liquid‐liquid phase separation (LLPS) could drive the formation of robust, stable, and sustainable plastics using small molecules. The LLPS process could...

article

Small‐Molecule‐based Supramolecular Plastics Mediated by Liquid‐Liquid Phase Separation**

Jingjing Yu, Dawei Qi, Ermei Mäkilä, Lippo Lassila, more

Angewandte Chemie International Edition > 61 > 39 > n/a - n/a

article

Fabrication of TiO2 nanofibers/MXene Ti3C2 nanocomposites for photocatalytic H2 evolution by electrostatic self-assembly

Yan Zhuang, Yunfei Liu, Xianfeng Meng

Applied Surface Science > 2019 > 496 > C

Semiconductor based photocatalytic water splitting as a most bright method to solve the energy crisis has been widely studied in the past decade. Among them, MXene has become the focus of current research as a new, effective and inexpensive promoter-free catalyst. Herein, a novel 1D/2D photocatalyst of TiO ₂ /Ti ₃ C ₂ is successfully prepared by electrostatic self-assembly technique. The maximum...

article

Plate-to-Layer Bi₂MoO₆/MXene-Heterostructured Anode for Lithium-Ion Batteries

Peng Zhang, Danjun Wang, Qizhen Zhu, Ning Sun, more

Nano-Micro Letters > 2019 > 11 > 1 > 1-14

Bi₂MoO₆ is a potentially promising anode material for lithium-ion batteries (LIBs) on account of its high theoretical capacity coupled with low desertion potential. Due to low conductivity and large volume expansion/contraction during charge/discharge cycling of Bi₂MoO₆, effective modification is indispensable to address these issues. In this study, a plate-to-layer Bi₂MoO₆/Ti₃C₂T_x (MXene) heterostructure...

article

Preparation of a hydrophilic interaction liquid chromatography material by sequential electrostatic deposition of layers of polyethyleneimine and hyaluronic acid for enrichment of glycopeptides

Qiliang Zhan, Hongli Zhao, Yayun Hong, Chenlu Pu, more

Microchimica Acta > 2019 > 186 > 9 > 1-10

A hydrophilic interaction liquid chromatography (HILIC) material with application in glycoproteomics was obtained by sequential deposition of polyethyleneimine (PEI) and hyaluronic acid (HA) on a negatively charged substrate by means of electrostatic self-assembly. This kind of surface modification endows the material with excellent hydrophilicity and warrants efficient glycopeptides enrichment. The...

article

Synthesis of Chitosan-g-Poly(ethylene glycol)-g-Polyethyleneimine Copolymer and Its Research as Drug Carrier

Chuanhui Zong, Yiang Sun, Na Zhang, Fei Wang, more

Macromolecular Research > 2019 > 27 > 8 > 772-780

Tumors have emerged as the number one cause of death with the incidence rate rising rapidly due to various factors. Nanoparticle-mediated PolyI:C (PIC) delivery is a promising approach in the treatment of various tumors. However, the delivery of PIC to target cells is very difficult. Therefore, it is necessary to develop carriers which can safely deliver PIC to the target cells. In this study, chitosan-...

article

Supramolecular Self-Assembly and Phase Transformations in Aqueous Systems Based on Chitosan and Sulfonated Metallophthalocyanines

I. M. Lipatova, E. A. Mezina, A. A. Yusova

Russian Journal of General Chemistry > 2019 > 89 > 3 > 612-618

The supramolecular self-assembly in mixed low-concentrated aqueous solutions of chitosan and sulfonated metallophthalocyanines was examined by spectroscopic and dynamic light scattering techniques. The research subjects were Cu(II) and Co(II) tetrasulfophthalocyaninates, as well as Cu(II) phthalocyaninate containing sulfonate groups and a vinylsulfonic substituent. The resulting supramolecular complexes...

article

Sandwich-like SnO₂/MoO_3−x prepared by electrostatic self-assembly for high-performance photocatalysis

Hanxin Zhang, Gongguan Wang, Guoliang Dai, Xiaowen Xu

Research on Chemical Intermediates > 2019 > 45 > 4 > 2369-2381

Sandwich-structured SnO₂/MoO_3−x has been successfully synthesized through electrostatic self-assembly. The crystal structure, morphology, size and composition of products were investigated by XRD, TEM (HRTEM), XPS and UV–Vis technologies. It was found that SnO₂ nanoparticles are embedded between the layers of MoO_3−x nanosheets. The investigation of photocatalytic properties indicated that the SnO₂...

article

Facile fabrication of a BiOI/TiO2 p-n junction via a surface charge-induced electrostatic self-assembly method

Qingbo Li, Hao Qin, Hongkai Zhao, Xian Zhao, more

Applied Surface Science > 2018 > 457 > C > 59-68

Constructing p-n junctions is an efficient strategy to resolve the narrow light absorption range and rapid electron-hole recombination problems of single photocatalysts. However, the promotion effect is greatly limited by poor interfacial contact between the p-type and n-type semiconductors. Herein, a facile surface charge-induced electrostatic self-assembly strategy is developed to construct BiOI/TiO...

article

Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery

Ming-Shan Wang, Zhi-Qiang Wang, Ran Jia, Yi Yang, more

Applied Surface Science > 2018 > 456 > C > 379-389

Silicon(Si)/graphene composite has been regarded as one of the most promising candidates for next generation anode materials with high power and energy density in lithium ion batteries. Introduction of graphene in Si anodes could improve the electronic conductivity, suppress the severe volume expansion of Si, and facilitate the formation of stable solid electrolyte interphase, etc. However, traditionally...

article

Electrostatic self-assembly of LiFePO4 cathodes on a three-dimensional substrate for lithium ion batteries

Guiying Tian, Frieder Scheiba, Lukas Pfaffmann, Andy Fiedler, more

Electrochimica Acta > 2018 > 283 > C > 1375-1383

In this work, the electrostatic self-assembly of LiFePO₄ particles coated with polyelectrolytes on a three-dimensional carbon substrate is described. This new fabrication method allows precise control of ionic and electronic conduction pathways as well as the interfaces between the different electrode components, thus enabling new strategies for tailored electrode designs. Further, it is shown that...

article

Effect of Cysteine Substitutions on the Structural and Magnetic Properties of Fe₃O₄–Cysteine/RGO and Fe₃O₄/RGO–Cysteine Nanocomposites

Hajar Sahebalzamani, Kheirollah Mehrani, Hamid Reza Madaah Hosseini, Karim Zare

Journal of Superconductivity and Novel Magnetism > 2019 > 32 > 5 > 1299-1306

We synthesized by electrostatic self-assembly route in basic solution Fe₃O₄–cysteine/RGO and Fe₃O₄/RGO–cysteine nanocomposites. In this method, electrostatic interaction was created via negatively charged surface of the reduced graphene oxide and reduced graphene oxide–cysteine sheets and positively charged surface of the Fe₃O₄ and Fe₃O₄–Cys nanoparticles in aqueous solution. The structural and magnetic...

article

Porphyrin microneedles—structure control and catalytic activity

Jasmin Düring, Sandra Haschke, Julien Bachmann, Franziska Gröhn

Colloid and Polymer Science > 2018 > 296 > 7 > 1235-1248

The formation of a novel porphyrin colloidal structure has been investigated—so called microneedles. The porphyrin colloids consist of the tetravalent anionic tetra-(4-sulfonatophenyl)porphyrin (TPPS) and the tetravalent cationic tetra-(N-methyl-4-pyridyl)porphyrin (TMPyP), forming ionic organic solid particles in ethanol. The structure dependence on various influences such as ratio of TMPyP to TPPS,...

article

Design of three-dimensional macroporous reduced graphene oxide–Fe₃O₄ nanocomposites for the removal of Cr(VI) from wastewater

Yurong Liu, Zongqiang Zhang, Xiangwei Sun, Tianyu Wang

Journal of Porous Materials > 2019 > 26 > 1 > 109-119

Three-dimensional macroporous reduced graphene oxide–Fe₃O₄ nanocomposites (3D macroporous rGO–Fe₃O₄ nanocomposites) were synthesized through electrostatic self-assembly method. The morphology and structure characteristics of 3D macroporous rGO–Fe₃O₄ nanocomposites were studied in detail. Then 3D macroporous rGO–Fe₃O₄ nanocomposites were used as adsorbents for the removal of Cr(VI) from wastewater...

article

Stable silicon/3D porous N-doped graphene composite for lithium-ion battery anodes with self-assembly

Xiaofu Tang, Guangwu Wen, Yan Song

Applied Surface Science > 2018 > 436 > C > 398-404

We fabricate a novel 3D N-doped graphene/silicon composite for lithium-ion battery anodes, with Si nanoparticles uniformly dispersed and thoroughly embedded in the N-doped graphene matrix. The favorable structure of the composite results in a BET surface area and an average mesopore diameter of 189.2m²g⁻¹ and 3.82nm, respectively. The composite delivers reversible capacities as high as 1132mAhg⁻¹...

article

Fabrication of a New Self-assembly Compound of CsTi₂NbO₇ with Cationic Cobalt Porphyrin Utilized as an Ascorbic Acid Sensor

Mengjun Wang, Jiasheng Xu, Xiaobo Zhang, Zichun Fan, more

Applied Biochemistry and Biotechnology > 2018 > 185 > 3 > 834-846

A novel sandwich-structured nanocomposite based on Ti₂NbO₇⁻ nanosheets and cobalt porphyrin (CoTMPyP) was fabricated through electrostatic interaction, in which CoTMPyP has been successfully inserted into the lamellar spacing of layered titanoniobate. The resultant Ti₂NbO₇/CoTMPyP nanocomposite was characterized by XRD, SEM, TEM, EDS, FT-IR, and UV-vis. It is demonstrated that the intercalated CoTMPyP...

article

Protein-alginate complexes as pH-/ion-sensitive carriers of proteins

Vida Rahmani, Heather Sheardown

International Journal of Pharmaceutics > 2018 > 535 > 1-2 > 452-461

Protein-alginate complexes were prepared with the objective of quantifying the influence of the parameters such as protein characteristics on the final complex properties and their dissociation rates. Cytochrome C, lysozyme, myoglobin, chymotrypsin, and bovine serum albumin were used as model proteins for preparing the complexes and physical properties such as composition, average diameter, and zeta...

article

Hemocompatible ɛ-polylysine-heparin microparticles: A platform for detecting triglycerides in whole blood

Tingting Xu, Bo Chi, Meilin Chu, Qicheng Zhang, more

Biosensors and Bioelectronics > 2018 > 99 > C > 571-577

Triglycerides are clinically important marker for atherosclerosis, heart disease and hypertension. Here, a platform for detecting triglycerides in whole blood directly was developed based on hemocompatible ɛ-polylysine-heparin microparticles. The obtained products of ɛ-polylysine-heparin microparticles were characterized by fourier transform infrared (FT-IR) spectra, transmission electron microscopy...

article

A sensitive label-free immunosensor for detection α-Fetoprotein in whole blood based on anticoagulating magnetic nanoparticles

Tingting Xu, Bo Chi, Fan Wu, Shangshang Ma, more

Biosensors and Bioelectronics > 2017 > 95 > C > 87-93

Accurate values of tumor markers in blood play an especially important role in the diagnosis of illness. Here, based on the combination of three techniques include anticoagulant technology, nanotechnology and biosensing technology, a sensitive label-free immunosensor with anti-biofouling electrode for detection α-Fetoprotein (AFP) in whole blood was developed by anticoagulating magnetic nanoparticles...

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Search results

Joining Two Switches in One Nano‐Object: Photoacidity and Photoisomerization in Electrostatic Self‐Assembly

Small‐Molecule‐based Supramolecular Plastics Mediated by Liquid‐Liquid Phase Separation**

Small‐Molecule‐based Supramolecular Plastics Mediated by Liquid‐Liquid Phase Separation**

Fabrication of TiO2 nanofibers/MXene Ti3C2 nanocomposites for photocatalytic H2 evolution by electrostatic self-assembly

Plate-to-Layer Bi₂MoO₆/MXene-Heterostructured Anode for Lithium-Ion Batteries

Preparation of a hydrophilic interaction liquid chromatography material by sequential electrostatic deposition of layers of polyethyleneimine and hyaluronic acid for enrichment of glycopeptides

Synthesis of Chitosan-g-Poly(ethylene glycol)-g-Polyethyleneimine Copolymer and Its Research as Drug Carrier

Supramolecular Self-Assembly and Phase Transformations in Aqueous Systems Based on Chitosan and Sulfonated Metallophthalocyanines

Sandwich-like SnO₂/MoO_3−x prepared by electrostatic self-assembly for high-performance photocatalysis

Facile fabrication of a BiOI/TiO2 p-n junction via a surface charge-induced electrostatic self-assembly method

Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery

Electrostatic self-assembly of LiFePO4 cathodes on a three-dimensional substrate for lithium ion batteries

Effect of Cysteine Substitutions on the Structural and Magnetic Properties of Fe₃O₄–Cysteine/RGO and Fe₃O₄/RGO–Cysteine Nanocomposites

Porphyrin microneedles—structure control and catalytic activity

Design of three-dimensional macroporous reduced graphene oxide–Fe₃O₄ nanocomposites for the removal of Cr(VI) from wastewater

Stable silicon/3D porous N-doped graphene composite for lithium-ion battery anodes with self-assembly

Fabrication of a New Self-assembly Compound of CsTi₂NbO₇ with Cationic Cobalt Porphyrin Utilized as an Ascorbic Acid Sensor

Protein-alginate complexes as pH-/ion-sensitive carriers of proteins

Hemocompatible ɛ-polylysine-heparin microparticles: A platform for detecting triglycerides in whole blood

A sensitive label-free immunosensor for detection α-Fetoprotein in whole blood based on anticoagulating magnetic nanoparticles

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