Plasmonic Vesicles of Amphiphilic Gold Nanocrystals: Self-Assembly and External-Stimuli-Triggered Destruction

2011 ◽  
Vol 133 (28) ◽  
pp. 10760-10763 ◽  
Author(s):  
Jibin Song ◽  
Lin Cheng ◽  
Aiping Liu ◽  
Jun Yin ◽  
Min Kuang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Gold Nanocrystals ◽  
External Stimuli

Topological liquid crystal superstructures as structured light lasers

2021 ◽  
Vol 118 (49) ◽  
pp. e2110839118
Author(s):  
Miha Papič ◽  
Urban Mur ◽  
Kottoli Poyil Zuhail ◽  
Miha Ravnik ◽  
Igor Muševič ◽  
...  
Keyword(s):  
Self Assembly ◽  
Soft Matter ◽  
Structured Light ◽  
Topological Defects ◽  
Photonic Devices ◽  
Light Polarization ◽  
Self Healing ◽  
Fabry Perot ◽  
Self Assembled ◽  
External Stimuli

Liquid crystals (LCs) form an extremely rich range of self-assembled topological structures with artificially or naturally created topological defects. Some of the main applications of LCs are various optical and photonic devices, where compared to their solid-state counterparts, soft photonic systems are fundamentally different in terms of unique properties such as self-assembly, self-healing, large tunability, sensitivity to external stimuli, and biocompatibility. Here we show that complex tunable microlasers emitting structured light can be generated from self-assembled topological LC superstructures containing topological defects inserted into a thin Fabry–Pérot microcavity. The topology and geometry of the LC superstructure determine the structuring of the emitted light by providing complex three-dimensionally varying optical axis and order parameter singularities, also affecting the topology of the light polarization. The microlaser can be switched between modes by an electric field, and its wavelength can be tuned with temperature. The proposed soft matter microlaser approach opens directions in soft matter photonics research, where structured light with specifically tailored intensity and polarization fields could be designed and implemented.

Self-assembled structures of polyhedral gold nanocrystals: shape-directive arrangement and structure-dependent plasmonic enhanced characteristics

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57320-57326 ◽  
Author(s):  
Yanting Liu ◽  
Jun Zhou ◽  
Lu Zhou ◽  
Edwin Yue-Bun Pun ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Plasmonic Enhancement ◽  
Casting Method ◽  
Antenna Effect ◽  
Gold Nanocrystals ◽  
Different Types ◽  
Self Assembled

Self-assembly structures of different types of polyhedral nanocrystals through drop casting method and their plasmonic enhancement characteristics and SERS performances due to the nano-antenna effect.

scholarly journals Pillararenes Trimer for Self-Assembly

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 651 ◽  
Author(s):  
Huacheng Zhang ◽  
Zhaona Liu ◽  
Hui Fu
Keyword(s):  
Self Assembly ◽  
Driving Forces ◽  
Click Reaction ◽  
Noncovalent Interactions ◽  
Coupling Reaction ◽  
Covalent Bonds ◽  
Guest Molecules ◽  
Palladium Catalyzed ◽  
Noncovalent Bonds ◽  
External Stimuli

Pillararenes trimer with particularly designed structural geometry and excellent capacity of recognizing guest molecules is a very efficient and attractive building block for the fabrication of advanced self-assembled materials. Pillararenes trimers could be prepared via both covalent and noncovalent bonds. The classic organic synthesis reactions such as click reaction, palladium-catalyzed coupling reaction, amidation, esterification, and aminolysis are employed to build covalent bonds and integrate three pieces of pillararenes subunits together into the “star-shaped” trimers and linear foldamers. Alternatively, pillararenes trimers could also be assembled in the form of host-guest inclusions and mechanically interlocked molecules via noncovalent interactions, and during those procedures, pillararenes units contribute the cavity for recognizing guest molecules and act as a “wheel” subunit, respectively. By fully utilizing the driving forces such as host-guest interactions, charge transfer, hydrophobic, hydrogen bonding, and C–H…π and π–π stacking interactions, pillararenes trimers-based supramolecular self-assemblies provide a possibility in the construction of multi-dimensional materials such as vesicular and tubular aggregates, layered networks, as well as frameworks. Interestingly, those assembled materials exhibit interesting external stimuli responsiveness to e.g., variable concentrations, changed pH values, different temperature, as well as the addition/removal of competition guests and ions. Thus, they could further be used for diverse applications such as detection, sorption, and separation of significant multi-analytes including metal cations, anions, and amino acids.

Influence of Tunable External Stimuli on the Self-Assembly of Guanosine Supramolecular Nanostructures Studied By Atomic Force Microscope

Langmuir ◽  
2009 ◽  
Vol 25 (23) ◽  
pp. 13432-13437 ◽  
Author(s):  
Yinli Li ◽  
Mingdong Dong ◽  
Daniel E Otzen ◽  
Yuheng Yao ◽  
Bo Liu ◽  
...  
Keyword(s):  
Atomic Force Microscope ◽  
Self Assembly ◽  
The Self ◽  
Atomic Force ◽  
External Stimuli

UV light-induced self-assembly of gold nanocrystals into chains and networks in a solution of silver nitrate

2013 ◽  
Vol 24 (5) ◽  
pp. 055601 ◽  
Author(s):  
Shu Jun Zhen ◽  
Zhong Yue Zhang ◽  
Na Li ◽  
Zhi Dong Zhang ◽  
Jian Wang ◽  
...  
Keyword(s):  
Silver Nitrate ◽  
Self Assembly ◽  
Uv Light ◽  
Gold Nanocrystals

Size and Morphology Adjustment of PVP-Stabilized Silver and Gold Nanocrystals Synthesized by Hydrodynamic Assisted Self-Assembly

2009 ◽  
Vol 113 (20) ◽  
pp. 8595-8600 ◽  
Author(s):  
Licheng Liu ◽  
Ting Wei ◽  
Xiao Guan ◽  
Xuehong Zi ◽  
Hong He ◽  
...  
Keyword(s):  
Self Assembly ◽  
Gold Nanocrystals ◽  
Size And Morphology

Self-assembly of metal/semiconductor heterostructures via ligand engineering: unravelling the synergistic dual roles of metal nanocrystals toward plasmonic photoredox catalysis

Nanoscale ◽  
2017 ◽  
Vol 9 (43) ◽  
pp. 16922-16936 ◽  
Author(s):  
Ke-Yi Jiang ◽  
Ya-Li Weng ◽  
Si-Yi Guo ◽  
Yan Yu ◽  
Fang-Xing Xiao
Keyword(s):  
Self Assembly ◽  
Semiconductor Heterostructures ◽  
Photoredox Catalysis ◽  
Dual Roles ◽  
Gold Nanocrystals ◽  
Metal Nanocrystals ◽  
Electron Withdrawal ◽  
Withdrawal Effects

A cooperative synergy arising from the SPR and electron-withdrawal effects of gold nanocrystals was simultaneously and unambiguously unraveled for plasmonic photoredox catalysis.

Freezing the self-assembly process of gold nanocrystals

2012 ◽  
Vol 48 (11) ◽  
pp. 1677-1679 ◽  
Author(s):  
Abdennour Abbas ◽  
Limei Tian ◽  
Ramesh Kattumenu ◽  
Abigail Halim ◽  
Srikanth Singamaneni
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Assembly Process ◽  
Gold Nanocrystals

scholarly journals A nanotube-mediated path to protocell formation

2018 ◽  
Author(s):  
Elif Senem Köksal ◽  
Susanne Liese ◽  
Ilayda Kantarci ◽  
Ragni Olsson ◽  
Andreas Carlson ◽  
...  
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Solid Surfaces ◽  
Mechanical Agitation ◽  
Spontaneous Transformation ◽  
Electrical Currents ◽  
Membrane Compartments ◽  
Cellular Compartments ◽  
External Stimuli ◽  
Physical And Chemical

AbstractCellular compartments are membrane-enclosed, spatially distinct microenvironments which confine and protect biochemical reactions in the biological cell. On the early Earth, the autonomous formation of compartments is thought to have led to the encapsulation of nucleotides, thereby satisfying a starting condition for the emergence of life. Recently, surfaces have come into focus as potential platforms for the self-assembly of prebiotic compartments, as significantly enhanced vesicle formation was reported in the presence of solid interfaces. The detailed mechanism of such formation at the mesoscale is still under discussion. We report here on the spontaneous transformation of solid surface-adhered lipid deposits to unilamellar membrane compartments through a straightforward sequence of topological changes, proceeding via a network of interconnected lipid nanotubes. We show that this transformation is entirely driven by surface-free energy minimization and does not require hydrolysis of organic molecules, or external stimuli such as electrical currents or mechanical agitation. The vesicular structures take up and encapsulate their external environment during formation, and can subsequently separate and migrate upon exposure to hydrodynamic flow. This may link, for the first time, the self-directed transition from weakly organized bioamphiphile assemblies on solid surfaces to protocells with secluded internal contents.SignificanceThe nature of the physical and chemical mechanisms behind the formation, growth and division of the earliest protocells is among the key questions concerning the origin of life. Establishing a simple pathway for the assembly of protocell structures from the primordial soup is a particular challenge. Emerging evidence supporting the assumption that solid surfaces have a governing role in protocell formation has recently expanded the scope, and created new inspiration for investigation. By presenting a physical path from self-assembled amphiphile-based membranes on solid surfaces to spherical single-membrane compartments via a consistent sequence of transformations, solely driven by the materials properties of the interfaces, a direct link between the presence of functional biomolecules and the development of protocells can be established.

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