scholarly journals Micro-fabrication by laser radiation forces: A direct route to reversible free-standing three-dimensional structures

2012 ◽  
Vol 20 (22) ◽  
pp. 24735 ◽  
Author(s):  
Loukas Athanasekos ◽  
Miltiadis Vasileiadis ◽  
Christos Mantzaridis ◽  
Vagelis C. Karoutsos ◽  
Ioannis Koutselas ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Three Dimensional ◽  
Free Standing ◽  
Micro Fabrication ◽  
Direct Route ◽  
Radiation Forces

N-Doped Carbon-Wrapped Cobalt–Manganese Oxide Nanosheets Loaded into a Three-Dimensional Graphene Nanonetwork as a Free-Standing Anode for Lithium-Ion Storage

2021 ◽  
Vol 4 (4) ◽  
pp. 3619-3630
Author(s):  
Peilin Zhang ◽  
Weiwei Wang ◽  
Jinzhe Liu ◽  
Chencheng Zhou ◽  
Jiao-Jiao Zhou ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Free Standing ◽  
Ion Storage

Fabrication of Three-Dimensional Micro-Structures with Two-Photon Absorption by Femtosecond Laser

2006 ◽  
Vol 532-533 ◽  
pp. 568-571
Author(s):  
Ming Zhou ◽  
Hai Feng Yang ◽  
Li Peng Liu ◽  
Lan Cai
Keyword(s):  
Photonic Crystal ◽  
Femtosecond Laser ◽  
Detection System ◽  
Three Dimensional ◽  
Photon Absorption ◽  
Micro Fabrication ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photo Polymerization ◽  
System A

The photo-polymerization induced by Two-Photon Absorption (TPA) is tightly confined in the focus because the efficiency of TPA is proportional to the square of intensity. Three-dimensional (3D) micro-fabrication can be achieved by controlling the movement of the focus. Based on this theory, a system for 3D-micro-fabrication with femtosecond laser is proposed. The system consists of a laser system, a microscope system, a real-time detection system and a 3D-movement system, etc. The precision of micro-machining reaches a level down to 700nm linewidth. The line width was inversely proportional to the fabrication speed, but proportional to laser power and NA. The experiment results were simulated, beam waist of 0.413μm and TPA cross section of 2×10-54cm4s was obtained. While we tried to optimize parameters, we also did some research about its applications. With TPA photo-polymerization by means of our experimental system, 3D photonic crystal of wood-pile structure twelve layers and photonic crystal fiber are manufactured. These results proved that the micro-fabrication system of TPA can not only obtain the resolution down to sub-micron level, but also realize real 3D micro-fabrication.

Free-standing graphene-based porous carbon films with three-dimensional hierarchical architecture for advanced flexible Li–sulfur batteries

2015 ◽  
Vol 3 (18) ◽  
pp. 9438-9445 ◽  
Author(s):  
Chao Wu ◽  
Lijun Fu ◽  
Joachim Maier ◽  
Yan Yu
Keyword(s):  
Porous Carbon ◽  
Three Dimensional ◽  
Carbon Films ◽  
Hierarchical Architecture ◽  
Free Standing ◽  
Hierarchically Porous

A novel free-standing cathode film consisting of hierarchically porous carbon-encapsulated sulfur has been designed and fabricated for Li–sulfur batteries.

Residual Stress Measurement and Simulation of 3C-SiC Single and Poly Crystal Cantilevers

2010 ◽  
Vol 645-648 ◽  
pp. 865-868 ◽  
Author(s):  
Ruggero Anzalone ◽  
Massimo Camarda ◽  
Daniel Alquier ◽  
M. Italia ◽  
Andrea Severino ◽  
...  
Keyword(s):  
Experimental Data ◽  
Theoretical Study ◽  
Stress Measurement ◽  
Bulk Material ◽  
Raman Shift ◽  
Silicon Substrates ◽  
Free Standing ◽  
Element Analysis ◽  
Micro Fabrication ◽  
Sic Films

The fabrication of SiC MEMS-based sensors requires new processes able to realize microstructures on either bulk material or on the SiC surface. The hetero-epitaxial growth of 3C-SiC on silicon substrates allows one to overcome the traditional limitations of SiC micro-fabrication. In this work a comparison between single crystal and poly crystal 3C-SiC micro-machined structures will be presented. The free-standing structures realized (cantilevers and membrane) are also a suitable method for residual field stress investigation in 3C-SiC films. Measurement of the Raman shift indicates that the mono and poly-crystal 3C-SiC structures release the stress in different ways. Finite element analysis was performed to determine the stress field inside the films and provided a good fit to the experimental data. A comprehensive experimental and theoretical study of 3C-SiC MEMS structures has been performed and is presented.

Lengths and topology of alveolar septal borders

1989 ◽  
Vol 67 (5) ◽  
pp. 1930-1940 ◽  
Author(s):  
E. H. Oldmixon ◽  
J. P. Butler ◽  
F. G. Hoppin
Keyword(s):  
Connective Tissue ◽  
Three Dimensional ◽  
Free Standing ◽  
And Topology ◽  
Section Area ◽  
Dimensional Reconstruction ◽  
Alveolar Duct ◽  
Mechanical Linkage ◽  
Alveolar Septa ◽  
Alveolar Parenchyma

To clarify the mechanics of alveolar parenchyma, we undertook a stereological and topological study in perfusion-fixed canine lungs of the borders of alveolar septa. We defined the principal borders as those along which one septum 1) joins two others (J), 2) joins one other at a distinct angle (B), or 3) joins no other structure (E). E and B borders are invariably reinforced with heavy connective tissue cables; J borders are not. Relative net lengths, determined from the number of traces per section area, were J, 45%; E, 19%; and B, 25%. These were remarkably constant over 10 canine lobes (5 animals, 4 volumes). Parenchyma, then, departs from the simple models that comprise only Js and Es. Bs are important; their net length exceeds that of Es. With lobe deflation, E shortened somewhat more than required to maintain geometric similarity, suggesting that the alveolar duct contracted disproportionately. A three-dimensional reconstruction was made from serial sections, and individual border segments were followed through the reconstruction. Typical lengths of individual J, B, and E borders were nearly equal. To characterize how the network of borders were interconnected, we counted the nodes at which they meet by class, e.g., EBE for the meeting of one B, two Es. The most common are JJJJ, 26%; EEEJ, 10%; EBJ, 24%; EBE, 8%; BBJJ, 12%. If parenchyma were constructed only from free-standing entrance rings and septal junctions, only JJJJ and EEEJ would be anticipated. The presence of EBJ, EBE, and BBJJ underscores parenchymal complexity. Only 7% of septa examined were bordered entirely by Js. Connective tissue cables were not confined to the alveolar duct's lumen but often extended to the primary septa at the periphery of the ductal unit. They rarely linked adjacent alveolar ducts; only 1 in 200 cable segments crossed from one duct to another. These observations support the concept that the parenchyma is an elastic network, characterized in part by a serial mechanical linkage from connective tissue cable to septal membrane to cable again.

Flexible Three-Dimensional Heterostructured ZnO-Co3O4 on Carbon Cloth as Free-Standing Anode with Outstanding Li/Na Storage Performance

2018 ◽  
Vol 165 (16) ◽  
pp. A3932-A3942 ◽  
Author(s):  
Huanhui Chen ◽  
Libo Deng ◽  
Shan Luo ◽  
Xiangzhong Ren ◽  
Yongliang Li ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Carbon Cloth ◽  
Free Standing ◽  
Storage Performance

scholarly journals Linen Boxes and Slices: Raoul De Keyser and American Modernism in Belgium in the 1960s and 1970s

Arts ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 80
Author(s):  
Steven Jacobs
Keyword(s):  
Three Dimensional ◽  
Pop Art ◽  
Free Standing ◽  
American Modernism ◽  
Hard Edge ◽  
Three Dimensional Objects ◽  
Color Field Painting ◽  
New Vision ◽  
1960S And 1970S ◽  
The 1960S

Before his international breakthrough shortly before the turn of the century, Belgian painter Raoul De Keyser (1930–2012) had a long career that reaches back to the 1960s, when he was associated with Roger Raveel and the so-called Nieuwe Visie (New Vision in Dutch), Belgium’s variation on postwar figurative painting that also entails Anglo-Saxon Pop Art and French nouveau réalisme. Dealing with De Keyser’s works of the 1960s and 1970s, this article discusses the reception of American late-modernist art currents such as Color-Field Painting, Hard Edge, Pop Art, and Minimal Art in Belgium. Drawing on contemporaneous reflections (by, among others, poet and critic Roland Jooris) as well as on recently resurfaced materials from the artist’s personal archives, this essay focuses on the ways innovations associated with these American trends were appropriated by De Keyser, particularly in the production of his so-called Linen Boxes and Slices. Made between 1967 and 1971, Linen Boxes and Slices are paintings that evolved into three-dimensional objects, free-standing on the floor or leaning against the wall. Apart from situating these constructions in De Keyser’s oeuvre, this article interprets Linen Boxes and Slices as particular variations on Pop Art’s fascination for consumer items and on Minimalism’s interest in the spatial and material aspects of “specific objects”.

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