Multilayered film microreactors fabricated by a one-step thermal bonding technique with high reproducibility and their applications

Lab on a Chip ◽  
2016 ◽  
Vol 16 (6) ◽  
pp. 977-983 ◽  
Author(s):  
Kyoung-Ik Min ◽  
Jin-Oh Kim ◽  
Heejin Kim ◽  
Do Jin Im ◽  
Dong-Pyo Kim
Keyword(s):  
Three Dimensional ◽  
Multilayered Film ◽  
Thermal Bonding ◽  
High Reproducibility ◽  
Membrane Emulsification ◽  
Pressure Tolerance ◽  
One Step ◽  
Bonding Technique

We report the versatile uses of multilayered polyimide (PI) film microreactors with various functions including pressure tolerance, three-dimensional mixing and multistep membrane emulsification.

Controllable Electrochemical Synthesis of Ag Hierarchical Micro/Nanostructures with High SERS-Activity

NANO ◽  
2020 ◽  
Vol 15 (04) ◽  
pp. 2050043
Author(s):  
Huayu Zhou ◽  
Jingjing Wang ◽  
Qiong Yang ◽  
Menglei Chen ◽  
Changsheng Song ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Current System ◽  
Three Dimensional ◽  
Constant Current ◽  
Localized Surface Plasmon ◽  
Excitation Wavelength ◽  
Raman Signal ◽  
Mixed Solution ◽  
Raman Enhancement ◽  
One Step

We report a one-step electrochemical deposition technique to prepare three-dimensional (3D) Ag hierarchical micro/nanostructured film consisting of well-crystallized Ag nanosheets grown on an indium tin oxide (ITO) conductive substrate. The Ag hierarchical micro/nanostructures were fabricated in the mixed solution of AgNO3 and sodium citrate in a constant current system at room temperature. Through reduction of Ag[Formula: see text] electrodeposited on the surface of ITO substrate, nanoparticles were grown to form nanosheets which further combined into 3D sphere-like microstructures. The 3D Ag micro/nanostructures have many sharp edges and nanoscale gaps which can give rise to good Raman-enhanced effect. Due to localized surface plasmon resonance (LSPR) effects, these special Ag micro/nanostructures exhibited good Raman-enhanced performance. Using Rhodamine 6G (R6G) molecules as probe molecule, we studied the influence of excitation wavelength on Raman enhancement. The results showed that the 532[Formula: see text]nm excitation wavelength is the best to obtain the strongest Raman signal and to reduce the influence of other impurity peaks. Using the as-synthesized Ag hierarchical micro/nanostructures, we can detect the 10[Formula: see text][Formula: see text]mol/L R6G aqueous solution, exhibiting great Raman-enhanced effect.

scholarly journals A Review on Additive Manufacturing Possibilities for Electrical Machines

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1940
Author(s):  
Muhammad Usman Naseer ◽  
Ants Kallaste ◽  
Bilal Asad ◽  
Toomas Vaimann ◽  
Anton Rassõlkin
Keyword(s):  
Additive Manufacturing ◽  
Large Scale ◽  
Three Dimensional ◽  
Electrical Machines ◽  
Electromagnetic Properties ◽  
Scale Production ◽  
Performance Parameters ◽  
Large Scale Production ◽  
One Step ◽  
Manufacturing Techniques

This paper presents current research trends and prospects of utilizing additive manufacturing (AM) techniques to manufacture electrical machines. Modern-day machine applications require extraordinary performance parameters such as high power-density, integrated functionalities, improved thermal, mechanical & electromagnetic properties. AM offers a higher degree of design flexibility to achieve these performance parameters, which is impossible to realize through conventional manufacturing techniques. AM has a lot to offer in every aspect of machine fabrication, such that from size/weight reduction to the realization of complex geometric designs. However, some practical limitations of existing AM techniques restrict their utilization in large scale production industry. The introduction of three-dimensional asymmetry in machine design is an aspect that can be exploited most with the prevalent level of research in AM. In order to take one step further towards the enablement of large-scale production of AM-built electrical machines, this paper also discusses some machine types which can best utilize existing developments in the field of AM.

scholarly journals Is Dialdehyde Chitosan a Good Substance to Modify Physicochemical Properties of Biopolymeric Materials?

2021 ◽  
Vol 22 (7) ◽  
pp. 3391
Author(s):  
Sylwia Grabska-Zielińska ◽  
Alina Sionkowska ◽  
Ewa Olewnik-Kruszkowska ◽  
Katarzyna Reczyńska ◽  
Elżbieta Pamuła
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Physicochemical Properties ◽  
Silk Fibroin ◽  
Three Dimensional ◽  
Microscopy Imaging ◽  
Maximum Deformation ◽  
One Step ◽  
Chitosan Blends ◽  
Fourier Transfer Infrared Spectroscopy

The aim of this work was to compare physicochemical properties of three dimensional scaffolds based on silk fibroin, collagen and chitosan blends, cross-linked with dialdehyde starch (DAS) and dialdehyde chitosan (DAC). DAS was commercially available, while DAC was obtained by one-step synthesis. Structure and physicochemical properties of the materials were characterized using Fourier transfer infrared spectroscopy with attenuated total reflectance device (FTIR-ATR), swelling behavior and water content measurements, porosity and density observations, scanning electron microscopy imaging (SEM), mechanical properties evaluation and thermogravimetric analysis. Metabolic activity with AlamarBlue assay and live/dead fluorescence staining were performed to evaluate the cytocompatibility of the obtained materials with MG-63 osteoblast-like cells. The results showed that the properties of the scaffolds based on silk fibroin, collagen and chitosan can be modified by chemical cross-linking with DAS and DAC. It was found that DAS and DAC have different influence on the properties of biopolymeric scaffolds. Materials cross-linked with DAS were characterized by higher swelling ability (~4000% for DAS cross-linked materials; ~2500% for DAC cross-linked materials), they had lower density (Coll/CTS/30SF scaffold cross-linked with DAS: 21.8 ± 2.4 g/cm3; cross-linked with DAC: 14.6 ± 0.7 g/cm3) and lower mechanical properties (maximum deformation for DAC cross-linked scaffolds was about 69%; for DAS cross-linked scaffolds it was in the range of 12.67 ± 1.51% and 19.83 ± 1.30%) in comparison to materials cross-linked with DAC. Additionally, scaffolds cross-linked with DAS exhibited higher biocompatibility than those cross-linked with DAC. However, the obtained results showed that both types of scaffolds can provide the support required in regenerative medicine and tissue engineering. The scaffolds presented in the present work can be potentially used in bone tissue engineering to facilitate healing of small bone defects.

Three-dimensional graphene/polyimide composite-derived flexible high-performance organic cathode for rechargeable lithium and sodium batteries

2017 ◽  
Vol 5 (6) ◽  
pp. 2710-2716 ◽  
Author(s):  
Yanshan Huang ◽  
Ke Li ◽  
Jingjing Liu ◽  
Xing Zhong ◽  
Xiangfeng Duan ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
3D Graphene ◽  
Sodium Batteries ◽  
One Step

A 3D graphene/polyimide composite is fabricated by a one-step solvothermal strategy as a high-performance cathode for both rechargeable lithium and sodium batteries.

Three-dimensional graphene oxide/polypyrrole composite electrodes fabricated by one-step electrodeposition for high performance supercapacitors

2015 ◽  
Vol 3 (27) ◽  
pp. 14445-14457 ◽  
Author(s):  
Jianyun Cao ◽  
Yaming Wang ◽  
Junchen Chen ◽  
Xiaohong Li ◽  
Frank C. Walsh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Three Dimensional ◽  
Composite Electrodes ◽  
Ion Diffusion ◽  
One Step ◽  
Supercapacitor Performance ◽  
Polypyrrole Composite ◽  
Fast Ion ◽  
Interconnected Structure

The 3D interconnected structure of the GO/PPy composite ensures fast ion diffusion through the electrode, leading to excellent supercapacitor performance.

Single step synthesized three dimensional spindle-like nanoclusters as lithium-ion battery anodes

CrystEngComm ◽  
2018 ◽  
Vol 20 (22) ◽  
pp. 3043-3048 ◽  
Author(s):  
Lingyu Zhang ◽  
Zhigang Gao ◽  
Haiming Xie ◽  
Chungang Wang ◽  
Lu Li ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Anode Materials ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Single Step ◽  
Conventional Heating ◽  
Heating Method ◽  
3D Architecture ◽  
One Step

A facile, green, mild and one-step conventional heating method was developed to synthesize monodisperse Sn-doped Fe2O3 nanoclusters with a novel spindle-like 3D architecture as anode materials for lithium-ion batteries.

scholarly journals One-Step Acidic Hydrothermal Preparation of Dendritic Rutile TiO2 Nanorods for Photocatalytic Performance

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 683 ◽  
Author(s):  
Cheng Gong ◽  
Jun Du ◽  
Xiuyun Li ◽  
Zhenjie Yu ◽  
Jiansong Ma ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Contact Angle ◽  
Hydrothermal Method ◽  
Photocatalytic Performance ◽  
Three Dimensional ◽  
Tio2 Nanorods ◽  
Foil Surface ◽  
Rutile Tio2 ◽  
X Ray ◽  
One Step

Three-dimensional and dendritic rutile TiO2 nanorods were successfully fabricated on a Ti foil surface using a one-step acidic hydrothermal method. The TiO2 nanorods were characterized using X-ray diffraction (XRD), energy dispersive X-ray spectrometry (EDX), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and optical contact angle testing. The results showed that the nanorods with diameters of 100–500 nm and lengths of 100 nm to 1 μm were obtained on the Ti foil surface. The length and density of the TiO2 nanorods were perfect at the conditions of HCl concentration 0.5 mol/L, temperature 220 °C, and reaction time 12 h. The TiO2 nanorods formed parallel to the consumption of Ti and grew along the (110) direction having a tetragonal rutile crystal. The morphology of the nanorods possessed a three-dimensional structure. The contact angle of the nanorods was only 13 ± 3.1°. Meanwhile, the photocatalytic activities of the TiO2 nanorods were carried out using ultraviolet fluorescence spectrophotometry for the methyl orange detection, and the degradation was found to be about 71.00% ± 2.43%. Thus, TiO2 nanorods can be developed by a one-step acidic hydrothermal method using Ti foil simultaneously as the substrate with a TiO2 source; the TiO2 nanorods exhibited photocatalytic performance while being environment-friendly.

Abstract TP136: Four-dimensionally Guided Three-dimensional Color-doppler Ultrasonography Quantifies Carotid Artery Stenoses With Equally High Reproducibility and Accuracy Compared to Catheter Angiography

Stroke ◽  
2016 ◽  
Vol 47 (suppl_1) ◽  
Author(s):  
Roland Richard Macharzina ◽  
Sascha Kocher ◽  
Steven R Messé ◽  
Fabian Hoffmann ◽  
Thomas Rutkowski ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Doppler Ultrasonography ◽  
Binary Classification ◽  
Color Doppler ◽  
Pearson Correlation ◽  
Three Dimensional ◽  
Catheter Angiography ◽  
High Reproducibility ◽  
Stenosis Quantification ◽  
Stenosis Detection

Introduction: Clinical stratification in patients with ICAS largely depends on symptomatic status and stenosis grading. The purpose was to analyze the agreement and binary accuracy for the degree of internal carotid artery stenoses (ICAS) as determined by four-dimensional (4D) real-time guided three-dimensional color-Doppler (3DC) ultrasonography (4D/3DC-US) compared to catheter angiography (CA). Hypothesis: We hypothesized that 4D/3DC-US is non inferior to CA in grading ICAS in selected patients. Methods: Screening with 4D/3DC-US was performed in 93 patients (122 ICAS) admitted to our vascular center.Main exclusion criteria were insufficient image quality, previous revascularization and contraindications to CA. Eighty patients were prospectively examined in optimal planes with 4D-US assisted static 3DC-US color-Doppler (10MHz) followed by blinded multiplanar off-line rendering to determine %-NASCET stenosis. Multiplane selective CA of the same ICAS were quantified with dedicated software in a blinded fashion. Results: Quantitative CA of 103 stenoses with a mean degree of 65 ± 17% were compared to 4D/3DC-US resulting in a Pearson correlation coefficient of 0.89 and a standard deviation of differences (SDD) of 8.1% at a bias of +1.7%. Binary 50, 60 and 70%-stenosis detection with 3DC-US revealed an accuracy of 96, 89, 85%, a sensitivity of 97, 92, 87% and a specificity of 92, 83 and 84%. Interobserver SDD for CA of 52 stenoses (7.2%) did not differ from SDD between 3DC-US and CA (P = 0.274). Conclusions: 4D/3DC-US allowed good metric stenosis quantification and accurate binary classification with high reproducibility in a selected cohort.

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