Tunable device properties of free-standing inorganic/organic flexible hybrid structures obtained by exfoliation

2012 ◽  
Vol 100 (24) ◽  
pp. 242108 ◽  
Author(s):  
Amitha Shetty ◽  
Karuna Kar Nanda
Keyword(s):  
Hybrid Structures ◽  
Free Standing ◽  
Tunable Device ◽  
Device Properties

2D-MoS2/BMN Ceramic Hybrid Structure Flexible TFTs with Tunable Device Properties

2020 ◽  
Vol 12 (34) ◽  
pp. 38306-38313
Author(s):  
Junqing Wei ◽  
Shihui Yu ◽  
Xin Shan ◽  
Kuibo Lan ◽  
Xiaodong Yang ◽  
...  
Keyword(s):  
Hybrid Structure ◽  
Tunable Device ◽  
Device Properties

Investigation into pre-stress modes and optimal layout of a new hybrid cable-strut system

2019 ◽  
Vol 23 (7) ◽  
pp. 1259-1275
Author(s):  
Rasoul Asghari ◽  
Karim Abedi ◽  
Mohammad Reza Chenaghlou
Keyword(s):  
Hybrid Structure ◽  
Combination Method ◽  
Hybrid Structures ◽  
Structural Behavior ◽  
Force Distribution ◽  
Fundamental Issue ◽  
Optimal Layout ◽  
Free Standing ◽  
Form Finding ◽  
Cable Dome

Cable domes obtain their stability through the boundary compression ring that contradicts the free-standing principle of tensegrities. Replacement of that with a tensegrity ring has recently attracted the attention of researchers. In this study, form-finding of a modified hybrid structure consisting of a tensegrity ring and a Levy cable dome has been presented. Two groups of different configurations with two different arrangements of modules in tensegrity ring and also two connecting methods between the ring and cable dome parts were considered in the hybrid structures. Since the distribution of pre-stress forces is a fundamental issue in structural behavior, the proximity of pre-stress force values between two parts of ring and cable dome was chosen as comparison criterion. The form-finding of a variety of hybrid cases was carried out and results were compared with the previously proposed hybrid structure and with each other to achieve the best combination method between two parts. It was found that the hybrid cases proposed in this study have a very better pre-stress force distribution and finally the best hybrid structure also was presented.

Spintronics of semiconductor, metallic, dielectric, and hybrid structures (100th anniversary of the Ioffe Institute)

2018 ◽  
Vol 189 (08) ◽  
pp. 849-880
Author(s):  
Pavel G. Baranov ◽  
Aleksandra M. Kalashnikova ◽  
Veniamin I. Kozub ◽  
Vladimir L. Korenev ◽  
Yurii G. Kusrayev ◽  
...  
Keyword(s):  
100Th Anniversary ◽  
Hybrid Structures ◽  
Ioffe Institute

Body balance in a free-standing position in road and off-road cyclists

2014 ◽  
Vol 6 (4) ◽  
Author(s):  
Paulina Hebisz ◽  
Rafal Hebisz ◽  
Marek Zaton
Keyword(s):  
Sagittal Plane ◽  
Standing Position ◽  
The Body ◽  
Free Standing ◽  
Body Balance ◽  
Eyes Closed ◽  
Road Cycling ◽  
Progressive Exercise ◽  
Before And After ◽  
Road Cyclists

AbstractBackground: The purpose of this study was to compare body balance in road and off-road cyclists, immediately before and after the racing season.Material/Methods: Twenty individuals participated in the study and they were divided into two groups: specialists in road-cycling (n = 10) and in off-road cycling (n = 10). Immediately before and after the five-month racing season stabilographic trials were carried out (at rest and after progressive exercise). In assessing body balance the distance and velocity of the centre shifts (in the anterior-posterior and left-right direction) were analysed. The tests were performed with the cyclists’ eyes open, eyes closed, and in feedback.Results: After the racing season, in the off-road cyclists’ group, distance and velocity of the centre of pressure shifts increased after a progressive exercise.Conclusions: In the off-road cyclists’ group the balance of the body in the sagittal plane deteriorated after the racing season. Moreover, after the racing season off-road cyclists were characterized by a worse balance of the body, compared to road cyclists

Wrinkling Poly(trimethylene 2,5-Furanoate) Free-standing Films: Nanostructure Formation and Physical Properties

2020 ◽  
Author(s):  
Michelina Soccio ◽  
Nadia Lotti ◽  
Andrea Munari ◽  
Esther Rebollar ◽  
Daniel E Martínez-Tong
Keyword(s):  
Irradiation Time ◽  
Polymer Surface ◽  
Laser Source ◽  
Free Standing ◽  
Force Microscopy ◽  
Nanostructure Formation ◽  
Physicochemical Changes ◽  
Angle Measurements ◽  
Atomic Force ◽  
Contact Angle Measurements

<p>Nanostructured wrinkles were developed on fully bio-based poly(trimethylene furanoate) (PTF) films by using the technique of Laser Induced Periodic Surface Structures (LIPSS). We investigated the effect of irradiation time on wrinkle formation using an UV pulsed laser source, at a fluence of 8 mJ/cm2. It was found that the pulse range between 600 and 4800 pulses allowed formation of periodic nanometric ripples. The nanostructured surface was studied using a combined macro- and nanoscale approach. We evaluated possible physicochemical changes taking place on the polymer surface after irradiation by infrared spectroscopy, contact angle measurements and atomic force microscopy. The macroscopic physicochemical properties of PTF showed almost no changes after nanostructure formation, differently from the results previously found for the terephthalic counterparts, as poly(ethyleneterephthalate), PET, and poly(trimethyleneterephthalate), PTT. The surface mechanical properties of the nanostructured PTF were found to be improved, as evidenced by nanomechanical force spectroscopy measurements. In particular, an increased Young’s modulus and higher stiffness for the nanostructured sample were measured. <br></p>

Ultrastrong, Free-Standing and Large Nanofilms of Pyrenearamid

2019 ◽  
Author(s):  
Amalia Rapakousiou ◽  
Alejandro López-moreno ◽  
Belén Nieto-Ortega ◽  
M. Mar Bernal ◽  
Miguel A. Monclús ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Building Block ◽  
Aromatic Polyamide ◽  
Free Standing ◽  
Spatial Confinement ◽  
Polymeric Structure ◽  
Reduced Modulus ◽  
Organizational Arrangement ◽  
Polycyclic Aromatic ◽  
Nanoscale Building Block

We introduce poly(1,6-pyrene terephthalamide) polymer (PPyrTA) as an aromatic polyamide analogue of poly(p-phenylene terephthalamide) (PPTA), also known as Kevlar®. This work shows that the incorporation of polycyclic aromatic pyrene moieties improves drastically the mechanical properties of the polymeric structure, increasing elastic nanoindentation-determined modulus and hardness by factors of 1.9 and 4.3, respectively. Liquid deprotonated dispersions of PPyrTA nanofibers were used as nanoscale building block for producing large-surface, free-standing polymer macroscopic nanofilms. This 2D assembly leads to further significant improvements in reduced modulus and hardness (more than twice) compared to the starting polymer macroscale fibres, due to a better re-organizational arrangement of the PPyrTA nanofibers in the nanofilms, formed under 2D spatial confinement.

An Examination on Hybrid Structures Renovated from the Old Railway Steel Bridges with Polymer Cement Mortar

2016 ◽  
Vol 106 (1) ◽  
pp. 1014-1019
Author(s):  
Nozomu TANIGUCHI ◽  
Yusuke SUGINO ◽  
Fujikazu OHKUBO ◽  
Weiwei LIN ◽  
Shinya SATAKE ◽  
...  
Keyword(s):  
Cement Mortar ◽  
Steel Bridges ◽  
Hybrid Structures
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