scholarly journals Three dimensional optical manipulation and structural imaging of soft materials by use of laser tweezers and multimodal nonlinear microscopy

2010 ◽  
Vol 18 (26) ◽  
pp. 27658 ◽  
Author(s):  
Rahul P. Trivedi ◽  
Taewoo Lee ◽  
Kris A. Bertness ◽  
Ivan I. Smalyukh
Keyword(s):  
Three Dimensional ◽  
Soft Materials ◽  
Optical Manipulation ◽  
Laser Tweezers ◽  
Nonlinear Microscopy ◽  
Structural Imaging

scholarly journals Internal Structural Imaging of Cultural Wooden Relics Based on Three-Dimensional Computed Tomography

BioResources ◽  
2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Guiling Zhao ◽  
Zhaowen Qiu ◽  
Jun Shen ◽  
Zhongji Deng ◽  
Jinghua Gong ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Structural Imaging

Three-dimensional optical manipulation of trapped light-absorbing particles based on a hollow beam

2021 ◽  
Author(s):  
Wending Zhang ◽  
Xuemei Cheng ◽  
Xing Wang ◽  
Chen Niu ◽  
Haowei Chen ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Optical Manipulation ◽  
Hollow Beam

scholarly journals Mechanical properties of magnetic gels containing rod-like composite particles

2019 ◽  
Vol 377 (2143) ◽  
pp. 20180218 ◽  
Author(s):  
Mariem M. Abrougui ◽  
Modesto T. Lopez-Lopez ◽  
Juan D. G. Duran
Keyword(s):  
Mechanical Properties ◽  
Magnetic Particles ◽  
Three Dimensional ◽  
Heterogeneous Systems ◽  
Soft Materials ◽  
Polymer Chains ◽  
Composite Particles ◽  
Magnetite Particles ◽  
Magneto Rheological ◽  
Mr Effect

Magnetic gels (ferrogels) are heterogeneous systems structured at the nanoscale that contains magnetic particles dispersed in three-dimensional networks of polymer chains. In the present work, the magnetic particles were synthesized with a core–shell structure, consisting of sepiolite particles covered by magnetite nanoparticles. These composite particles had a rod-like shape with a high aspect ratio. The obtained sepiolite–magnetite particles showed a high enough susceptibility and saturation magnetization. The magneto-rheological (MR) properties, and the intensity of the MR effect, of aqueous suspensions of the synthesized particles were studied. The particles, functionalized by adsorption of alginate molecules, were imbedded in alginate hydrogels to get homogeneous soft materials. The particles were linked to the polymer chains as the knots in a network and dominated in a great extent the mechanical properties of the materials. After determining the optimal compositions of the ferrogels, their viscoelastic properties were measured in the absence/presence of magnetic fields. The results pointed out that the MR effect provided by the clay–magnetite particles was considerably more intense than those achieved in ferrogels that contain spherical magnetic microparticles. Therefore, the imbedding of rod-shaped magnetic particles in hydrogels allows controlling the mechanical properties in a wider range than in conventional ferrogels. This article is part of the theme issue ‘Heterogeneous materials: metastable and non-ergodic internal structures’.

scholarly journals Elucidating the G″ overshoot in soft materials with a yield transition via a time-resolved experimental strain decomposition

2020 ◽  
Vol 117 (36) ◽  
pp. 21945-21952 ◽  
Author(s):  
Gavin J. Donley ◽  
Piyush K. Singh ◽  
Abhishek Shetty ◽  
Simon A. Rogers
Keyword(s):  
Loss Modulus ◽  
Three Dimensional ◽  
Design Feature ◽  
Soft Materials ◽  
Direct Write ◽  
Time Resolved ◽  
Three Dimensional Printing ◽  
Yielding Behavior ◽  
Filled Rubbers ◽  
Dimensional Printing

Materials that exhibit yielding behavior are used in many applications, from spreadable foods and cosmetics to direct write three-dimensional printing inks and filled rubbers. Their key design feature is the ability to transition behaviorally from solid to fluid under sufficient load or deformation. Despite its widespread applications, little is known about the dynamics of yielding in real processes, as the nonequilibrium nature of the transition impedes understanding. We demonstrate an iteratively punctuated rheological protocol that combines strain-controlled oscillatory shear with stress-controlled recovery tests. This technique provides an experimental decomposition of recoverable and unrecoverable strains, allowing for solid-like and fluid-like contributions to a yield stress material’s behavior to be separated in a time-resolved manner. Using this protocol, we investigate the overshoot in loss modulus seen in materials that yield. We show that this phenomenon is caused by the transition from primarily solid-like, viscoelastic dissipation in the linear regime to primarily fluid-like, plastic flow at larger amplitudes. We compare and contrast this with a viscoelastic liquid with no yielding behavior, where the contribution to energy dissipation from viscous flow dominates over the entire range of amplitudes tested.

scholarly journals Three-dimensional holographic optical manipulation through a high-numerical-aperture soft-glass multimode fibre

2017 ◽  
Vol 12 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Ivo T. Leite ◽  
Sergey Turtaev ◽  
Xin Jiang ◽  
Martin Šiler ◽  
Alfred Cuschieri ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Numerical Aperture ◽  
Optical Manipulation ◽  
High Numerical Aperture ◽  
Soft Glass

Dielectric enhanced nanoparticles for three-dimensional optical manipulation

2009 ◽  
Author(s):  
Woei Ming Lee ◽  
Jose Luis Hernández-Pozos ◽  
Liliana Irais Vera-Robles ◽  
Antonio Campero ◽  
Pascal Andre ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Optical Manipulation
Sign in / Sign up

Export Citation Format

Share Document