Circulating tumor cells (CTCs) detection, enumeration and characterization with microfluidic chips has critical significance in cancer prognosis offering a non-invasive "liquid biopsy". Based on physical differences of size deformability, we explore micro-ellipse filters consisting microfuidic slits series gradually narrowed. Slender tunnels sensitively capture slim chance to escape. Tumor could reside at sites organized by arrays microposts enduring less stress. Circular elliptical...

Functional elastomers with incredible toughness and stretchability are indispensable for applications in soft robotics wearable electronics. Furthermore, coupled excellent electrical thermal properties, these materials at the forefront of recent efforts toward widespread use cutting-edge electronics devices. Herein, we introduce a highly deformable eutectic-GaIn liquid metal alloy-embedded natural rubber (NR) architecture employing, first time, industrially viable solid-state mixing...

We have developed epoxy-based, water-soluble azo polymers containing ionizable groups in the azobenzene functionality. describe a novel approach of noncentrosymmetric self-assembly chromophores these through layer-by-layer deposition technique. The solution function as polyelectrolytes and were assembled into multilayers by alternately depositing ionic commercially available opposite charge on glass substrates. multilayer film self-assemble order requisite for exhibiting second-order NLO...

The electromagnetic force from two interfering light beams on isotropic materials is derived for surface relief grating formation processes. Navier-Stokes equation solved the induced motion inside ``photoplasticized'' amorphous azopolymer film. predicted inscription rates and velocities in processes are consistent with experimental evidences, indicating that gratings films formed by materials, under condition of ``photoplasticization'' through sufficient trans-cis-trans isomerization cycling.

An amphiphilic diacetylene, 10,12-pentacosadiynoic acid, was in-situ topochemically polymerized within a TiO2 nanostructure under visible light irradiation. The red shift of the wavelength at which polymerization occurs can be attributed to photocatalytic effect upon absorption Since transmitted through entire nanoporous film, it is possible obtain complete diacetylene monomers inside nanopores so as provide an approach toward fabrication polydiacetylene/TiO2 nanocomposite structure and...

A solid-state dye-sensitized solar cell was fabricated using in situ polymerized carboxylated diacetylene for hole transporting. Our preliminary experiments showed a short-circuit current density of 4.25 mA/cm2 and an efficiency 0.89%. These proof-of-concept results are believed to be some the highest reported polymeric transporting material based devices.

Thermal decomposition of an amido precursor; [Ga2(NMe2)6, Me=CH3] in ammonia atmosphere yielded nanostructured gallium nitride powder. The x-ray diffraction spectrum the nanosized exhibited reflections corresponding to lattice planes fcc (zinc blende) GaN. High resolution transmission electron microscopy confirmed cubic structure material and evidence stacking faults within structure. Infrared spectra showed characteristic Ga–N stretch at 550 cm−1. Transmission microscope measurements...

A luminescent polymer 3, consisting of a distyrylbenzene (PPV model oligomer) moiety and an oligo(ethylene glycol) (PEO has been synthesized by two independent methods: polymer-analogous Mitsunobu reaction conventional double displacement reaction. This new is soluble in variety organic solvents, forms excellent, optically clear films, exhibits strong fluorescence. solution the amplified stimulated emission with bandwidth 3 nm (fwhm) when pumped nitrogen laser. Initial experiments to use...

Template assisted enzymatic polymerization of phenol has been carried out in aqueous media at room temperature. The templates used to facilitate this reaction, were polystyrene sulfonate, lignin sulfonate and dodecyl benzene sulfonate. enzyme, horseradish peroxidase, proved be an active catalyst for the polymerization, yielding a phenolic polymer that is permanently complexed with template used. These polyphenol complexes are high molecular weight, soluble water and/or mixed organic solvents...

A maskless method for patterning substrates using surface relief structures on azobenzene‐functionalized polymer is demonstrated. Surface are inscribed a film spin‐coated an indium tin oxide (ITO) substrate by exposure to interference pattern. Etching with oxygen plasma followed zinc‐powder‐catalyzed liquid etchant yields periodically patterned ITO (see Figure).

A new series of diacetylenes, 9-(arylamino)-5,7-nonadiynyl-N-(alkoxycarbonylmethyl)urethanes was synthesized based on three design paradigms: (1) the polydiacetylene (PDA) conjugated backbone, (2) one side group as a chromophore, and (3) remaining with components to promote solubility processability. After exposure 60Co γ-radiation, resulting polydiacetylenes were highly soluble in many common organic solvents. These diacetylene monomers can be functionalized ease not only before but after...

Polymerization of 4-vinylbenzoic acid in the presence C60 using free radical initiator resulted covalent incorporation polymer structure. Incorporation moieties was established by IR, NMR, and UV−vis spectroscopy. The solution spectra these C60-containing copolymers appear to be dominated scattering, obscuring specific electronic excitation features associated with fullerene. spectral analysis filtrate fractions collected filters varying pore sizes indicates that polymers form microgels...

A beam of light that is incoherent to the recording beams and has its polarization orthogonal shown assist process azo-functionalized polymers through enhancement trans–cis–trans cycling. Recording with s:s earlier been result in very small surface modulations. However, help an assisting beam, it can record a large modulation diffraction efficiency 20.7%. The also leads acceleration grating formation rate for p:p 45°:45° polarization.

Photovoltaic performance of dye sensitized solar cells fabricated with a commercially available thiophene based copolymer was investigated. Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(bithiophene)], highly soluble polythiophene, used as sensitizer. An open-circuit voltage 0.64 V and short-circuit current density 0.36 mA/cm2 were measured. The incident photon to conversion efficiency for the polymer Fluorescence from other poly(3,3′-didodecyl quarter thiophene) found be quenched when blended...

Two-photon-induced fluorescence is observed from the photodynamic phycobiliprotein phycoerythrin. Temporal, spectral, and intensity-dependent properties of two-photon-induced emission phycoerythrin excited by a 1.06-mum laser beam are reported. The measured two-photon absorption cross section an order magnitude larger than that Rhodamine 6G. potential applications phycobiliproteins for microscopy three-dimensional biological samples optical memory discussed.

ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorComments on Analysis of Copolymers C60 with Vinyl Monomers Obtained by Free Radical PolymerizationPadma L. Nayak, Shridhara Alva, Ke Yang, Pradeep K. Dhal, Jayant Kumar, and Sukant TripathyView Author Information Departments Chemistry Physics, Center for Advanced Materials, University Massachusetts at Lowell, 01854 Cite this: Macromolecules 1997, 30, 23, 7351–7354Publication Date (Web):November 17,...

Perovskite solar cells (PSCs) have drawn extensive attention as promising next-generation photovoltaics due to their exceptional power conversion efficiency (PCE) and low fabrication cost over the past 10 years. However, poor stability remains biggest barrier for commercialization. Among many causes device degradation, inherent moisture instability of perovskite structure is one main reasons PSCs. In addition, chemical dopants used improve PCE further induce sensitivity Here, in this study,...

Electroabsorption spectroscopy measurements are reported on a multilayer thin film of prototypical azopolymer. The sample was prepared by sequentially dipping the substrate into aqueous solutions containing polycation poly(diallyl dimethyl ammonium chloride) and polyanion CH-1A-NS, an epoxy based polymer with azobenzene chromophore. measured ratio χ3333(3) to χ1133(3) for electrostatically assembled is 4, which indicates that chromophores in this oriented preferentially perpendicular plane...

Self organization and redox behavior of a ferrocene containing triblock copolymer, poly(vinylferrocene)-block-poly(isobutylene)-block-poly(vinylferrocene), with narrow molecular weight distribution in solutions thin films were investigated. Dynamic light scattering studies the block copolymer dilute indicated that polymer chains aggregated at relatively low concentrations. The aggregations observed toluene, as well tetrahydrofuran concentrations 0.014 mg/mL 0.0045 mg/mL, respectively. Thin...

Nano medicine is an emerging branch of pharmaceuticals, which gaining considerable attention mainly due to its new and effective way drug delivery. Various modes delivery are still in their adolescent stage, polymer-based system one among these. In order develop a novel biocompatible nano-carrier for through “green” and, environmentally benign approach, herein, we report the design, synthesis characterization four pluronic-based amphiphilic copolymers. Candida antartica lipase was used...