Self-Assembly of Linear Polymers into Phosphorescent Nanoparticles: Optimization toward Non-Cytotoxic Bioimaging and Photonic Devices

2015 ◽  
Vol 119 (22) ◽  
pp. 12551-12561 ◽  
Author(s):  
Sreekar Marpu ◽  
Prabhat K. Upadhyay ◽  
Duong T. Nguyen ◽  
Iain W. H. Oswald ◽  
Ravi K. Arvapally ◽  
...  
Keyword(s):  
Self Assembly ◽  
Photonic Devices ◽  
Linear Polymers

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.

scholarly journals Adsorption and self-assembly of linear polymers on surfaces: a computer simulation study

Soft Matter ◽  
2009 ◽  
Vol 5 (3) ◽  
pp. 637-645 ◽  
Author(s):  
Alexandros Chremos ◽  
Emmanouil Glynos ◽  
Vasileios Koutsos ◽  
Philip J. Camp
Keyword(s):  
Computer Simulation ◽  
Simulation Study ◽  
Self Assembly ◽  
Linear Polymers ◽  
Computer Simulation Study

Responsive porphyrinoid nanoparticles: development and applications

2011 ◽  
Vol 15 (05n06) ◽  
pp. 338-349 ◽  
Author(s):  
Amit Aggarwal ◽  
Meroz Qureshy ◽  
Jason Johnson ◽  
James D. Batteas ◽  
Charles Michael Drain ◽  
...  
Keyword(s):  
Self Assembly ◽  
Environmental Changes ◽  
Chemical Properties ◽  
Photonic Devices ◽  
Inorganic Nanoparticles ◽  
Synthetic Methods ◽  
Wide Range ◽  
Photochemical Properties ◽  
Increasing Demand ◽  
Organic Nanomaterials

The economy of space and materials and the continuously increasing demand for advanced functionalities for diverse technologies requires the development of new synthetic methods. Many nanomaterials have enhanced photophysical and photochemical properties in solutions and/or on surfaces, while others have enhanced chemical properties, compared to the atomic, molecular, or bulk phases. Nanomaterials have a wide range of applications in catalysis, sensors, photonic devices, drug delivery, and as therapeutics for treatment of a variety of diseases. Inorganic nanoparticles are widely studied, but the formation of organic nanomaterials via supramolecular chemistry is more recent, and porphyrinoids are at the forefront of this research because of their optical, chemical, and structural properties. The formation of nanoscaled materials via self-assembly and/or self-organization of molecular subunits is an attractive approach because of reduced energy requirements, simpler molecular subunits, and the material can be adaptive to environmental changes. The presence of biocompatible groups such as peptides, carbohydrates, polyglycols and mixtures of these on the periphery of the porphyrin macrocycle may make nanoparticles suitable for therapeutics. This perspective focuses on responsive, non-crystalline porphyrinoid nanomaterials that are less than about 100 nm in all dimensions and used for catalytic or therapeutic applications.

Progress in Carbon Nanotube Electronics and Photonics

MRS Bulletin ◽  
2010 ◽  
Vol 35 (4) ◽  
pp. 306-313 ◽  
Author(s):  
Phaedon Avouris ◽  
Richard Martel
Keyword(s):  
Self Assembly ◽  
Performance Optimization ◽  
High Performance ◽  
Crystalline Silicon ◽  
Dominant Role ◽  
Photonic Devices ◽  
Light Emitters ◽  
Tremendous Progress ◽  
High Carrier Mobility ◽  
High Carrier

AbstractIn electronics and photonics, intrinsic properties of semiconducting materials play a dominant role in achieving high-performance devices and circuits. In this respect, carbon nanotubes are prime candidates because of their exceptionally high carrier mobility, low capacitance, and strong optical response (direct bandgap). Although these properties compare very favorably with those of crystalline silicon, several issues related to their synthesis, processing, and assembly have challenged efforts for making electronic and photonic devices. Tremendous progress, nevertheless, has been achieved over the years, and much has been learned from novel photonic devices and electronic circuits. We review some of the developments in nanotube transistor performance optimization, ac operation, nanotube circuits, self-assembly, thin-film devices, and nanotube optical devices such as light emitters and detectors. We also examine the issues and opportunities that still exist.

One-Dimensional Organic and Organometallic Nanostructured Materials

2008 ◽  
Vol 8 (1) ◽  
pp. 69-87 ◽  
Author(s):  
Chun-Pei Cho ◽  
Tsong-Pyng Perng
Keyword(s):  
Self Assembly ◽  
Photonic Devices ◽  
Biocidal Activity ◽  
Molecular Electronic ◽  
Comprehensive Review ◽  
One Dimensional ◽  
Field Emission Properties ◽  
Potential Applications ◽  
Fundamental Research ◽  
Electronic Field

One-dimensional (1D) organic and organometallic nanomaterials are of considerable interests for both fundamental research and potential applications. They are likely to play critical roles in improving the efficiency of various electronic, photonic, biosensing devices, etc. In this context, the authors present a comprehensive review of current research on 1D organic and organometallic nanostructures. The synthetic strategies for achieving the 1D growth are elucidated by four categories: (1) template-based synthesis, (2) vapor-solid method, (3) solution-based self-assembly, and (4) dictation by the anisotropic nature. The unique thermal, optical, electronic, field emission properties and biocidal activity of 1D organic and organometallic nanostructures are consequently highlighted. Some promising applications in (integrated) molecular electronic, optoelectronic and photonic devices are also discussed.

Direct visualization of bottlebrush polymer conformations in the solid state

2021 ◽  
Vol 118 (40) ◽  
pp. e2109534118
Author(s):  
Jonathan M. Chan ◽  
Avram C. Kordon ◽  
Ruimeng Zhang ◽  
Muzhou Wang
Keyword(s):  
Solid State ◽  
Single Molecule ◽  
Self Assembly ◽  
Persistence Length ◽  
Polymer Melt ◽  
Side Chain ◽  
Linear Polymers ◽  
Polymer Science ◽  
Molecular Architecture ◽  
Similar System

Although the behavior of single chains is integral to the foundation of polymer science, a clear and convincing image of single chains in the solid state has still not been captured. For bottlebrush polymers, understanding their conformation in bulk materials is especially important because their extended backbones may explain their self-assembly and mechanical properties that have been attractive for many applications. Here, single-bottlebrush chains are visualized using single-molecule localization microscopy to study their conformations in a polymer melt composed of linear polymers. By observing bottlebrush polymers with different side chain lengths and grafting densities, we observe the relationship between molecular architecture and conformation. We show that bottlebrushes are significantly more rigid in the solid state than previously measured in solution, and the scaling relationships between persistence length and side chain length deviate from those predicted by theory and simulation. We discuss these discrepancies using mechanisms inspired by polymer-grafted nanoparticles, a conceptually similar system. Our work provides a platform for visualizing single-polymer chains in an environment made up entirely of other polymers, which could answer a number of open questions in polymer science.

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