Template-Assisted Electrochemical Synthesis of CdSe Quantum Dots—Polypyrrole Composite Nanorods

Luminescent nanoparticles have reached a high level of maturity in materials and spectral tunability for optics and optoelectronics. However, the lack of facile methodology for heterojunction formation of the nanoparticles provides many challenges for scalability. In this paper we demonstrate a simple procedure to synthesize a nanoparticle-embedded polymer nanorod hybrid structure via a template-based electrochemical method using anodic aluminum oxide membranes. This method enables the formation of interactive nanostructures wherein the interface area between the two components is maximized. As a proof of concept, semiconducting CdSe nanoparticles were embedded in polypyrrole nanorods with dimensions that can be finely tuned. We observed enhanced photoluminescence of the hybrid structures compared with bare polypyrrole nanorods.

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Zwitterionic polymer brush grafting on anodic aluminum oxide membranes by surface-initiated atom transfer radical polymerization

Polymer Chemistry ◽

10.1039/c7py00045f ◽

2017 ◽

Vol 8 (15) ◽

pp. 2309-2316 ◽

Cited By ~ 19

Author(s):

Chien-Wei Chu ◽

Yuji Higaki ◽

Chao-Hung Cheng ◽

Ming-Hsiang Cheng ◽

Chun-Wei Chang ◽

...

Keyword(s):

Aluminum Oxide ◽

Atom Transfer Radical Polymerization ◽

Radical Polymerization ◽

Anodic Aluminum Oxide ◽

Polymer Brush ◽

Atom Transfer ◽

Geometric Effect ◽

Anodic Aluminum ◽

Zwitterionic Polymer ◽

Oxide Membranes

A feasible processing of zwitterionic polymer-grafted anodic aluminum oxide (AAO) membranes by surface-initiated atom transfer radical polymerization (SI-ATRP) and the geometric effect were investigated.

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Influence of the anodization conditions and chemical treatment on the formation of alumina membranes with defined pore diameters

Journal of Porous Materials ◽

10.1007/s10934-021-01052-w ◽

2021 ◽

Author(s):

Iwona Dobosz

Keyword(s):

Aluminum Oxide ◽

Chemical Treatment ◽

Anodic Aluminum Oxide ◽

Pore Diameter ◽

Operating Conditions ◽

Oxide Growth ◽

Pore Density ◽

Anodic Aluminum ◽

Pore Widening ◽

Oxide Membranes

AbstractPorous anodic aluminum oxide membranes were fabricated via two-step anodization of aluminum in 0.3 M H2C2O4, 0.3 M H2SO4 and 0.17 M H3PO4 solutions. The parameters of the oxide film such as: pore diameter (Dp), interpore distance (Dc), porosity (P) and pore density (ρ) can be completely controlled by the operating conditions of the anodization. Additionally, the pore diameters and pore density can be controlled via a chemical treatment (pore opening/widening process). The effect of anodizing conditions such as the applied voltage, type of electrolyte and purity of the substrate on the rate of porous oxide growth are discussed. The obtained results were compared with the theoretical predictions and data that has been reported in the literature. The influence of the duration of chemical etching on the structural features of the oxide membranes was studied. On the based on qualitative and quantitative FFT analyzes and circularity maps, it was found that the nanostructures of anodized aluminum have the maximum order under certain specified conditions. The presence of alloying elements affects not only the rate of oxide growth but also the morphology of the anodic aluminum oxide. The rate of oxide growth depends on the electrolyte type and temperature. During chemical treatment of the oxide films pore diameter increases with the pore widening time and the highest pore widening was observed in phosphoric acid solution.

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Template Synthesis of Indium Nanowires Using Anodic Aluminum Oxide Membranes

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.300 ◽

2008 ◽

Vol 8 (9) ◽

pp. 4488-4493 ◽

Cited By ~ 4

Author(s):

Feng Chen ◽

Adrian H. Kitai

Keyword(s):

Aluminum Oxide ◽

Template Synthesis ◽

Anodic Aluminum Oxide ◽

Preferred Orientation ◽

Hydraulic Pressure ◽

X Ray Diffraction ◽

Aao Template ◽

X Ray ◽

Anodic Aluminum ◽

Oxide Membranes

Indium nanowires with diameters approximately 300 nm have been synthesized by a hydraulic pressure technique using anodic aluminum oxide (AAO) templates. The indium melt is injected into the AAO template and solidified to form nanostructures. The nanowires are dense, continuous and uniformly run through the entire ∼60 μm thickness of the AAO template. X-ray diffraction (XRD) reveals that the nanowires are polycrystalline with a preferred orientation. SEM is performed to characterize the morphology of the nanowires.

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Planning the Design and Execution of Student Performance Assessment in Serious Games

Journal on Interactive Systems ◽

10.5753/jis.2021.1907 ◽

2021 ◽

Vol 12 (1) ◽

pp. 172-190

Author(s):

Rháleff N. R. Oliveira ◽

Rafaela V. Rocha ◽

Denise H. Goya

Keyword(s):

Performance Assessment ◽

Student Performance ◽

Serious Games ◽

Proof Of Concept ◽

Personalized Feedback ◽

Student’S Performance ◽

Good Internal Consistency ◽

Learning Measurement ◽

High Level

Serious Games (SGs) are used to support knowledge acquisition and skill development. For this, there is a need to measure the results achieved (both during and after students play) to ensure the game effectiveness. In this context, the aim is to develop and evaluate the AvaliaJS, a conceptual model to structure, guide and support the planning of the design and execution of the student's performance assessment in SGs. AvaliaJS has two artifacts: a canvas model, for high-level planning, and an assessment project document, for more detailed specifications of the canvas. To analyze and exemplify the use of the model, the artifacts were applied to three ready-made games as a proof of concept. In addition, the quality of AvaliaJS was evaluated by experts in SGs development and assessment using a questionnaire. The results of experts' answers confirm a good internal consistency (Cronbach's alpha α = 0.87) which indicates that AvaliaJS is correct, authentic, consistent, clear, unambiguous and flexible. However, the model will need to be validated during the process of creating a new game to ensure its usability and efficiency. In general, AvaliaJS can be used to support the team in the planning, documentation and development of artifacts and data collection in SGs, as well as in the execution of the assessment, learning measurement and constant and personalized feedback for students.

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Development of an IoT System for Environmental Monitoring: Software

10.26686/wgtn.13557857 ◽

2021 ◽

Author(s):

Benjamin Secker

Keyword(s):

Environmental Monitoring ◽

Low Cost ◽

Proof Of Concept ◽

Embedded Devices ◽

Data Loggers ◽

Environmental Monitoring System ◽

Use Of The Internet ◽

High Level ◽

Monitoring Software ◽

The Internet Of Things

Use of the Internet of Things (IoT) is poised to be the next big advancement in environmental monitoring. We present the high-level software side of a proof-of-concept that demonstrates an end-to-end environmental monitoring system,<br><div>replacing Greater Wellington Regional Council’s expensive data loggers with low-cost, IoT centric embedded devices, and it’s supporting cloud platform. The proof-of-concept includes a Micropython-based software stack running on an ESP32 microcontroller. The device software includes a built-in webserver that hosts a responsive Web App for configuration of the device. Telemetry data is sent over Vodafone’s NB-IoT network and stored in Azure IoT Central, where it can be visualised and exported.</div><br>While future development is required for a production-ready system, the proof-of-concept justifies the use of modern IoT technologies for environmental monitoring. The open source nature of the project means that the knowledge gained can be re-used and modified to suit the use-cases for other organisations.

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A Visual Programming Approach for Co-designed Robots

Robotica ◽

10.1017/s0263574720000934 ◽

2020 ◽

pp. 1-24

Author(s):

Andrés S. Vázquez ◽

Tomás Calvo ◽

Raúl Fernández ◽

Francisco Ramos

Keyword(s):

Intelligent System ◽

Visual Programming ◽

Programming Approach ◽

Proof Of Concept ◽

Robot Operating System ◽

Programming Framework ◽

Ieee Standard ◽

High Level ◽

Visual Programming Language ◽

Robot Configurations

SUMMARY This paper proposes an approach for the high-level programming of co-designed robots that reduces programming complexity. Particularly, the work presented focuses on the programming framework of an intelligent system, based on the IEEE Standard Ontologies for Robotics and Automation, which allows users the automatic design of robots and the automatic implementation of controllers in the Robot Operating System (ROS). In our approach, the co-designed robot functionalities are automatically translated into visual programming blocks allowing non-expert users an easy robot programming by means of a visual programming language. Several robot configurations and three case studies are provided as a proof of concept. The validation, in terms of usability, of the framework has been carried out with inexperienced users showing promising results.

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