scholarly journals Light-Induced Self-Assembly: Silver-Nanowire-Based Interferometric Optical Tweezers for Enhanced Optical Trapping and Binding of Nanoparticles (Adv. Funct. Mater. 7/2019)

2019 ◽  
Vol 29 (7) ◽  
pp. 1970043 ◽  
Author(s):  
Fan Nan ◽  
Zijie Yan
Keyword(s):  
Optical Tweezers ◽  
Self Assembly ◽  
Optical Trapping ◽  
Silver Nanowire

scholarly journals Force generation by protein–DNA co-condensation

2021 ◽  
Author(s):  
Thomas Quail ◽  
Stefan Golfier ◽  
Maria Elsner ◽  
Keisuke Ishihara ◽  
Vasanthanarayan Murugesan ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Self Assembly ◽  
Spider Silk ◽  
Regulatory Elements ◽  
Heterochromatin Formation ◽  
First Order Phase Transition ◽  
Dna Strand ◽  
First Order Phase

AbstractInteractions between liquids and surfaces generate forces1,2 that are crucial for many processes in biology, physics and engineering, including the motion of insects on the surface of water3, modulation of the material properties of spider silk4 and self-assembly of microstructures5. Recent studies have shown that cells assemble biomolecular condensates via phase separation6. In the nucleus, these condensates are thought to drive transcription7, heterochromatin formation8, nucleolus assembly9 and DNA repair10. Here we show that the interaction between liquid-like condensates and DNA generates forces that might play a role in bringing distant regulatory elements of DNA together, a key step in transcriptional regulation. We combine quantitative microscopy, in vitro reconstitution, optical tweezers and theory to show that the transcription factor FoxA1 mediates the condensation of a protein–DNA phase via a mesoscopic first-order phase transition. After nucleation, co-condensation forces drive growth of this phase by pulling non-condensed DNA. Altering the tension on the DNA strand enlarges or dissolves the condensates, revealing their mechanosensitive nature. These findings show that DNA condensation mediated by transcription factors could bring distant regions of DNA into close proximity, suggesting that this physical mechanism is a possible general regulatory principle for chromatin organization that may be relevant in vivo.

Novel non-plasmonic optical trapping: nano-structured semiconductor assisted (NASSCA) optical tweezers

2018 ◽  
Author(s):  
Yuki Uenobo ◽  
Tatsuya Shoji ◽  
Ayaka Mototsuji ◽  
Sawa Komoto ◽  
Tatsuya Nagai ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Optical Trapping

scholarly journals Optical tweezers-based immunosensor detects femtomolar concentrations of antigens

1997 ◽  
Vol 43 (2) ◽  
pp. 379-383 ◽  
Author(s):  
Kristian Helmerson ◽  
Rani Kishore ◽  
William D Phillips ◽  
Howard H Weetall
Keyword(s):  
Optical Tweezers ◽  
Optical Trapping ◽  
Competitive Binding ◽  
Protein Antigen ◽  
Antigen Antibody

Abstract We used optical tweezers (optical trapping technology) to measure the force required to separate antigen–antibody bonds. Under competitive-binding conditions, we used the force determination to detect and measure protein antigen concentrations as small as 1 fmol/L (10−15 mol/L).

Free-standing, anti-corrosion, super flexible graphene oxide/silver nanowire thin films for ultra-wideband electromagnetic interference shielding

2021 ◽  
Author(s):  
Hui Jia ◽  
Xiao Yang ◽  
Qing-Qiang Kong ◽  
Li-Jing Xie ◽  
Quan-Gui Guo ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Self Assembly ◽  
Electromagnetic Interference ◽  
Silver Nanowire ◽  
Ultra Wideband ◽  
Electromagnetic Interference Shielding ◽  
Free Standing ◽  
Emi Se ◽  
Ag Nanowire

A free-standing graphene oxide/Ag nanowire film with a dense sandwich-like structure was fabricated via vacuum-assisted self-assembly. The EMI SE is up to 62 dB when the thickness is merely 8 μm in 8–40 GHz. The corresponding specific SE (EMI SE/t) is up to 77 500 dB cm−1.

Using self-assembly to prepare a graphene-silver nanowire hybrid film that is transparent and electrically conductive

Carbon ◽  
2013 ◽  
Vol 58 ◽  
pp. 198-207 ◽  
Author(s):  
Hsi-Wen Tien ◽  
Sheng-Tsung Hsiao ◽  
Wei-Hao Liao ◽  
Yi-Hsiuan Yu ◽  
Fong-Chi Lin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Hybrid Film ◽  
Silver Nanowire ◽  
Electrically Conductive

NOVEL OPTICAL TRAPPING TOOL GENERATION AND STORAGE CONTROLLED BY LIGHT

2010 ◽  
Vol 19 (02) ◽  
pp. 371-378 ◽  
Author(s):  
P. YOUPLAO ◽  
T. PHATTARAWORAMET ◽  
S. MITATHA ◽  
C. TEEKA ◽  
P. P. YUPAPIN
Keyword(s):  
Optical Tweezers ◽  
Optical Trapping ◽  
Optical Filter ◽  
Optical Tweezer ◽  
Dark Soliton ◽  
Optical Probe ◽  
Bright Soliton ◽  
Design System ◽  
Soliton Pulse ◽  
And Storage

We propose a novel system of an optical trapping tool using a dark-bright soliton pulse-propagating within an add/drop optical filter. The multiplexing signals with different wavelengths of the dark soliton are controlled and amplified within the system. The dynamic behavior of dark bright soliton interaction is analyzed and described. The storage signal is controlled and tuned to be an optical probe which can be configured as the optical tweezer. The optical tweezer storage is embedded within the add/drop optical filter system. By using some suitable parameters, we found that the tweezers storage time of 1.2 ns is achieved. Therefore, the generated optical tweezers can be stored and amplified within the design system. In application, the optical tweezers can be stored and trapped light/atom, which can be transmitted and recovered by using the proposed system.

MOLECULE-UP FABRICATION AND MANIPULATION OF LIPID NANOTUBES

2002 ◽  
Vol 01 (05n06) ◽  
pp. 465-469 ◽  
Author(s):  
TOSHIMI SHIMIZU ◽  
GEORGE JOHN ◽  
AKIHIRO FUKAGAWA ◽  
KOHZO ITO ◽  
HIROSHI FRUSAWA
Keyword(s):  
Optical Tweezers ◽  
Self Assembly ◽  
Flexural Rigidity ◽  
Combinatorial Approach ◽  
Tubular Structures ◽  
Self Assembling ◽  
Degree Of Unsaturation ◽  
Hydrophobic Chain ◽  
Rational Control ◽  
Lipid Nanotube

Self-assembling behavior of both a cardanol-appended glycolipid mixture and the fractionated four components has been examined in aqueous solutions. The cardanyl glucoside mixture differing in the degree of unsaturation in the hydrophobic chain was found to self-assemble in water to form open-ended nanotube structures with 10–15 nm inner diameters. The pure saturated homologue produced twisted helical ribbons through self-assembly, whereas the monoene derivative gave tubular structures. The rational control of helical and tubular morphologies has been achieved by a combinatorial approach through the binary self-assembly of the saturated and monoene derivatives. The flexural rigidity of a single lipid nanotube was first evaluated using optical tweezers manipulation and then compared with that of natural microtubules.

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