Track topics on Twitter Track topics that are important to you
Two-dimensional (2D) carbon nanosheets with micro- and/or mesopores have attracted great attention due to unique physical and chemical properties, but well-defined nanoporous carbon nanosheets with tunable thickness and pore size have been rarely realized. Here, we develop a polymer-polymer interfacial self-assembly strategy to achieve hierarchically porous carbon nanosheets (HNCNS) by integrating the migration behaviors of immiscible ternary polymers with block copolymer (BCP)-directed self-assembly. The balanced interfacial compatibility of BCP al-lows the migration of BCP-rich phase to the interface between two immiscible homo-polymer major phases (i.e., ho-mo-poly(methyl methacrylate) and homo-polystyrene), where BCP-rich phase spreads thinly to a thickness of a few nanometers to decrease the interfacial tension. BCP-directed co-assembly with organic-inorganic precursors con-structs an ordered mesostructure. Carbonization and chemical etching yield ultra-thin HNCNS with hierarchical micropores and mesopores. This approach enables facile control over the thickness (5.6 - 8.8 nm) and mesopore size (25 - 46 nm). As an anode material in a potassium ion battery, HNCNS shows high specific capacity (178 mA h g at current density of 1 A g) with excellent long-term stability (2000 cycles), by exploiting the advantages of the hierarchical pores and 2D nanosheet morphology (efficient ion/electron diffusion) and of the large interlayer spacing (stable ion insertion).
This article was published in the following journal.
Name: Journal of the American Chemical Society
We develop an improved self-assembly method to obtain a large-area, high-quality templated monolayer mask using the polystyrene spheres. Based on the templated mask, hierarchically ordered Si metastru...
We present a concurrent self-assembly strategy for patterning hierarchical polymeric surface features by depositing variable-composition blends of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) and...
The effect of polymer surfactant structure and concentration on the self-assembly, mechanical properties and solidification of nanoparticle surfactants (NPS) at the oil-water interface was studied. Th...
Perovskite solar cells based on two-dimensional/three-dimensional (2D/3D) hierarchical structure have attracted significant attention in recent years due to their promising photovoltaic performance an...
The challenges in achieving a green and scalable integration of two dimensional (2D) materials with flexible polymer substrates present a major barrier for the application of 2D materials such as grap...
This study evaluates whether whole blood transferred through the new POLFA needle assembly meets supernatant hemoglobin acceptability standards.
The study aims to determine the efficacy and best methods for predicting hip fractures and diagnosing post-menopausal osteoporosis using three dimensional structural engineering models (SE...
The aim of this study is to survey melanocytes in the ability of self-assembly on biomaterials and functional analysis in vitro. Also, this study may provide a better way for treatment of ...
The purpose of this study is to evaluate the efficacy of 3 different rapamycin-eluting-stent platforms to reduce coronary artery reblockage after stent implantation
In this randomized controlled trial; differences in overall stress, burnout and wellbeing will be assessed for employees of a company participating in Inner Engineering Online, an online m...
The statistical manipulation of hierarchically and non-hierarchically nested data. It includes clustered data, such as a sample of subjects within a group of schools. Prevalent in the social, behavioral sciences, and biomedical sciences, both linear and nonlinear regression models are applied.
Strongly cationic polymer that binds to certain proteins; used as a marker in immunology, to precipitate and purify enzymes and lipids. Synonyms: aziridine polymer; Epamine; Epomine; ethylenimine polymer; Montrek; PEI; Polymin(e).
Cell growth support structures composed of BIOCOMPATIBLE MATERIALS. They are specially designed solid support matrices for cell attachment in TISSUE ENGINEERING and GUIDED TISSUE REGENERATION uses.
Methods and techniques used to modify or select cells and develop conditions for growing cells for biosynthetic production of molecules (METABOLIC ENGINEERING), for generation of tissue structures and organs in vitro (TISSUE ENGINEERING), or for other BIOENGINEERING research objectives.
Echocardiography amplified by the addition of depth to the conventional two-dimensional ECHOCARDIOGRAPHY visualizing only the length and width of the heart. Three-dimensional ultrasound imaging was first described in 1961 but its application to echocardiography did not take place until 1974. (Mayo Clin Proc 1993;68:221-40)