scholarly journals Ligand-Related Precursors of Luminescent Carbon Nanofibers Synthesized by Microwave Reaction

2019 ◽  
Author(s):  
Clara Deeney ◽  
Eoin P. McKiernan ◽  
Samir A. Belhout ◽  
Brian J. Rodriguez
Keyword(s):  
Reaction Time ◽  
Aspect Ratio ◽  
Microwave Heating ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
High Aspect Ratio ◽  
Carbon Nanomaterials ◽  
Short Reaction Time ◽  
One Dimensional ◽  
Microwave Reaction

Luminescent carbon nanomaterials are important materials for sensing, imaging, and display technologies. This work describes the use of microwave heating for the template-assisted preparation of luminescent carbon nanofibers (CNFs) from the reaction of a range of beverage-related precursors with the nitrogen-rich polyethyleneimine. Highly luminescent robust carbon fibers that were 10 to 30 μm in length and had a diameter of 200 nm were obtained under moderate conditions of temperature (250–260 °C) and a short reaction time (6 min). The high aspect ratio fibers showed wavelength-dependent emission that can be readily imaged using epifluorescence. The development of these multi-emissive one-dimensional (1D) carbon nanomaterials offers potential for a range of applications.

scholarly journals Template-Assisted Synthesis of Luminescent Carbon Nanofibers from Beverage-Related Precursors by Microwave Heating

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1455
Author(s):  
Deeney ◽  
McKiernan ◽  
Belhout ◽  
Rodriguez ◽  
Redmond ◽  
...  
Keyword(s):  
Reaction Time ◽  
Aspect Ratio ◽  
Microwave Heating ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
High Aspect Ratio ◽  
Carbon Nanomaterials ◽  
Short Reaction Time ◽  
One Dimensional ◽  
Template Assisted Synthesis

Luminescent carbon nanomaterials are important materials for sensing, imaging, and display technologies. This work describes the use of microwave heating for the template-assisted preparation of luminescent carbon nanofibers (CNFs) from the reaction of a range of beverage-related precursors with the nitrogen-rich polyethyleneimine. Highly luminescent robust carbon fibers that were 10 to 30 m in length and had a diameter of 200 nm were obtained under moderate conditions of temperature (250–260 °C) and a short reaction time (6 min). The high aspect ratio fibers showed wavelength-dependent emission that can be readily imaged using epifluorescence. The development of these multi-emissive one-dimensional (1D) carbon nanomaterials offers potential for a range of applications.

Framework to model neutral particle flux in convex high aspect ratio structures using one-dimensional radiosity

2017 ◽  
Vol 128 ◽  
pp. 141-147 ◽  
Author(s):  
Paul Manstetten ◽  
Lado Filipovic ◽  
Andreas Hössinger ◽  
Josef Weinbub ◽  
Siegfried Selberherr
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Particle Flux ◽  
Neutral Particle ◽  
One Dimensional

scholarly journals Strong and Reversible Adhesion of Interlocked 3D-Microarchitectures

Coatings ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 48 ◽  
Author(s):  
Minho Seong ◽  
Hyun-Ha Park ◽  
Insol Hwang ◽  
Hoon Eui Jeong
Keyword(s):  
Aspect Ratio ◽  
Structural Stability ◽  
High Aspect Ratio ◽  
Three Dimensional ◽  
Normal Direction ◽  
One Dimensional ◽  
Reversible Adhesion ◽  
Adhesion Behavior ◽  
Organic Nanomaterials ◽  
Good Agreement

Diverse physical interlocking devices have recently been developed based on one-dimensional (1D), high-aspect-ratio inorganic and organic nanomaterials. Although these 1D nanomaterial-based interlocking devices can provide reliable and repeatable shear adhesion, their adhesion in the normal direction is typically very weak. In addition, the high-aspect-ratio, slender structures are mechanically less durable. In this study, we demonstrate a highly flexible and robust interlocking system that exhibits strong and reversible adhesion based on physical interlocking between three-dimensional (3D) microscale architectures. The 3D microstructures have protruding tips on their cylindrical stems, which enable tight mechanical binding between the microstructures. Based on the unique 3D architectures, the interlocking adhesives exhibit remarkable adhesion strengths in both the normal and shear directions. In addition, their adhesion is highly reversible due to the robust mechanical and structural stability of the microstructures. An analytical model is proposed to explain the measured adhesion behavior, which is in good agreement with the experimental results.

scholarly journals Arrayed ZnO Nanorods Fabrication on ZnO Film by Self-catalyst Growth Method in Aqueous Solution

2013 ◽  
Vol 1584 ◽  
Author(s):  
E. K.C. Pradeep ◽  
X. Li ◽  
T. Kawaharamura ◽  
D. Wang ◽  
A. Hatta ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Reaction Time ◽  
Hydrothermal Synthesis ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Zno Nanorods ◽  
Zno Film ◽  
Growth Method

ABSTRACTZnO nanorods were grown up from as-deposited ZnO film on which the zinc self-catalysts generated by a novel reducing method. Well aligned ZnO nanorods with a uniform high aspect ratio were grown up on multi-annealed samples. The length of nanorods depended significantly on the reaction time in the hydrothermal synthesis.

Microwave-assisted Al-substituted Tobermorite Synthesis

2000 ◽  
Vol 15 (4) ◽  
pp. 850-853 ◽  
Author(s):  
Michihiro Miyake ◽  
Shigeto Niiya ◽  
Motohide Matsuda
Keyword(s):  
Reaction Time ◽  
Hydrothermal Synthesis ◽  
Microwave Heating ◽  
Conventional Heating ◽  
Crystallization Time ◽  
Short Reaction Time ◽  
Microwave Assisted

The effect of microwave heating on the hydrothermal synthesis of Al-substituted tobermorite and the removal characteristics of resulting materials were examined and compared with the effect of conventional heating. The microwave heating reduced the crystallization time of Al-substituted tobermorite—i.e., Al-substituted tobermorite was synthesized within 80 min at around 140 °C—and produced smaller crystallites than the conventional heating. The minute crystallites were found to promote the removal characteristics for Cs+ ions in short reaction time.

Suspensions of carbon nanofibers in organic medium: rheo-electrical properties

2015 ◽  
Vol 17 (48) ◽  
pp. 32316-32327 ◽  
Author(s):  
Mohamed Youssry ◽  
Dominique Guyomard ◽  
Bernard Lestriez
Keyword(s):  
Electrical Properties ◽  
Aspect Ratio ◽  
Carbon Nanofibers ◽  
Propylene Carbonate ◽  
High Aspect Ratio ◽  
Structural Evolution ◽  
Organic Medium

The nonaqueous suspensions of carbon nanofibers (CNFs) in 1 M lithium bis(trifluoromethanesulfonaimide) in propylene carbonate electrolyte reveal unique structural evolution and shear-induced transition due to the high aspect ratio.

Urea-assisted template-less synthesis of heavily nitrogen-doped hollow carbon fibers for the anode material of lithium-ion batteries

2019 ◽  
Vol 43 (9) ◽  
pp. 3821-3828 ◽  
Author(s):  
Joonyoung Jang ◽  
Hee-eun Kim ◽  
Suhee Kang ◽  
Jin Ho Bang ◽  
Caroline Sunyong Lee
Keyword(s):  
Lithium Ion Batteries ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Lithium Ion ◽  
Gas Evolution ◽  
One Dimensional ◽  
Nitrogen Doped ◽  
Unique Decomposition ◽  
Decomposition Pathway ◽  
Hollow Carbon

A unique decomposition pathway of urea involving gas evolution was exploited as a way to introduce voids and mesopores into one-dimensional carbon nanofibers.

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