scholarly journals Fabrication of Active Surfaces with Metastable Microgel Layers Formed during Breath Figure Templating

2017 ◽  
Vol 9 (4) ◽  
pp. 4177-4183 ◽  
Author(s):  
Yuchen Zhou ◽  
Junjie Huang ◽  
Wei Sun ◽  
Yuanlai Ju ◽  
Pinghui Yang ◽  
...  
Keyword(s):  
Active Surfaces ◽  
Breath Figure

Controlling Gold Electrodeposition on Porous Polymeric Templates Produced by the Breath‐Figure Method: Fabrication of SERS‐Active Surfaces

ChemPlusChem ◽  
2019 ◽  
Vol 84 (8) ◽  
pp. 1052-1059 ◽  
Author(s):  
Rafael Neri Prystaj Colombo ◽  
Rodrigo Valim Moreira ◽  
Dalva Lúcia Araújo de Faria ◽  
Susana Inés Córdoba de Torresi
Keyword(s):  
Active Surfaces ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Polymeric Templates

Reactive Nanopattern in a Triple Structured Bio-Inspired Honeycomb Film as a Clickable Platform

2018 ◽  
Author(s):  
Pierre Marcasuzaa ◽  
Samuel Pearson ◽  
Karell Bosson ◽  
Laurence Pessoni ◽  
Jean-Charles Dupin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Double Porosity ◽  
Surface Groups ◽  
Specific Chemical ◽  
Site Specific ◽  
Surface Functionality ◽  
Wenzel State ◽  
Breath Figure ◽  
Responsive Surfaces ◽  
Secondary Population

A hierarchically structured platform was obtained from spontaneous self-assembly of a poly(styrene)-<i>b</i>-poly(vinylbenzylchloride) (PS-<i>b</i>-PVBC) block copolymer (BCP) during breath figure (BF) templating. The BF process using a water/ethanol atmosphere gave a unique double porosity in which hexagonally arranged micron-sized pores were encircled by a secondary population of smaller, nano-sized pores. A third level of structuration was simultaneously introduced between the pores by directed BCP self-assembly to form out-of-the-plane nano-cylinders, offering very rapid bottom-up access to a film with unprecedented triple structure which could be used as a reactive platform for introducing further surface functionality. The surface nano-domains of VBC were exploited as reactive nano-patterns for site-specific chemical functionalization by firstly substituting the exposed chlorine moiety with azide, then “clicking” an alkyne by copper (I) catalyzed azide-alkyne Huisgen cycloaddition (CuAAC). Successful chemical modification was verified by NMR spectroscopy, FTIR spectroscopy, and XPS, with retention of the micro- and nanostructuration confirmed by SEM and AFM respectively. Protonation of the cyclotriazole surface groups triggered a switch in macroscopic behavior from a Cassie-Baxter state to a Wenzel state, highlighting the possibility of producing responsive surfaces with hierarchical structure.

Degradable ultrathin high-performance photocatalytic hydrogen generator from porous electrospun composite fiber membrane with enhanced light absorption ability

2021 ◽  
Author(s):  
Qian-Yu Wang ◽  
Zheng-Min Zhang ◽  
Lin Liu ◽  
Lu Bai ◽  
Rui-Ying Bao ◽  
...  
Keyword(s):  
Phase Separation ◽  
Light Absorption ◽  
High Performance ◽  
Composite Fiber ◽  
Channel Structure ◽  
Separation Mechanism ◽  
Hydrogen Generator ◽  
Fiber Membrane ◽  
Breath Figure ◽  
Phase Separation Mechanism

Poly(L-lactide) (PLA)/TiO2/Pt composite fiber membrane with internal porous channel structure is fabricated by skillfully tuning the breath figure mechanism and vapor induced phase separation mechanism with solute and solvent matching...

scholarly journals Velvet fingers: Grasp planning and execution for an underactuated gripper with active surfaces

2014 ◽  
Author(s):  
Robert Krug ◽  
Todor Stoyanov ◽  
Manuel Bonilla ◽  
Vinicio Tincani ◽  
Narunas Vaskevicius ◽  
...  
Keyword(s):  
Grasp Planning ◽  
Active Surfaces

PtNiFe Nanoalloys with Co-existence of Energy-optimized Active surfaces for Synergistic Catalysis of Oxygen Reduction and Evolution

2021 ◽  
Author(s):  
wei yang ◽  
Wenbin Gong ◽  
Yanhong Shi ◽  
Xiaona Wang ◽  
Yulian Wang ◽  
...  
Keyword(s):  
Transition Metals ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Reduction Reaction ◽  
Synergistic Catalysis ◽  
Active Surfaces

Platinum nanocatalysts mediated by 3d transition metals show improved activity for oxygen reduction reaction (ORR) but poor activity for oxygen evolution reaction (OER). Herein, we report the preparation of a...

scholarly journals Body Flexibility Enhances Maneuverability in the World’s Largest Predator

2018 ◽  
Vol 59 (1) ◽  
pp. 48-60 ◽  
Author(s):  
P S Segre ◽  
D E Cade ◽  
J Calambokidis ◽  
F E Fish ◽  
A S Friedlaender ◽  
...  
Keyword(s):  
Open Ocean ◽  
The Body ◽  
Long Distance ◽  
Active Surfaces ◽  
Aquatic Locomotion ◽  
And Performance ◽  
And Control ◽  
Blue Whales ◽  
Control Surfaces ◽  
Complex Trajectories

Abstract Blue whales are often characterized as highly stable, open-ocean swimmers who sacrifice maneuverability for long-distance cruising performance. However, recent studies have revealed that blue whales actually exhibit surprisingly complex underwater behaviors, yet little is known about the performance and control of these maneuvers. Here, we use multi-sensor biologgers equipped with cameras to quantify the locomotor dynamics and the movement of the control surfaces used by foraging blue whales. Our results revealed that simple maneuvers (rolls, turns, and pitch changes) are performed using distinct combinations of control and power provided by the flippers, the flukes, and bending of the body, while complex trajectories are structured by combining sequences of simple maneuvers. Furthermore, blue whales improve their turning performance by using complex banked turns to take advantage of their substantial dorso-ventral flexibility. These results illustrate the important role body flexibility plays in enhancing control and performance of maneuvers, even in the largest of animals. The use of the body to supplement the performance of the hydrodynamically active surfaces may represent a new mechanism in the control of aquatic locomotion.

scholarly journals Correction: Breath figure in non-aqueous vapor

Soft Matter ◽  
2017 ◽  
Vol 13 (31) ◽  
pp. 5355-5355 ◽  
Author(s):  
Jianyun Ding ◽  
Aijuan Zhang ◽  
Hua Bai ◽  
Lei Li ◽  
Jian Li ◽  
...  
Keyword(s):  
Soft Matter ◽  
Breath Figure

Correction for ‘Breath figure in non-aqueous vapor’ by Jianyun Ding et al., Soft Matter, 2013, 9, 506–514.

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