16 results about "Plasmonic nanostructures" patented technology

A chemiluminescent nanoconstruct is described herein. The chemiluminescent nanoconstruct structure may comprise a plasmon nanostructure having at least one localized surface plasmon resonance wavelength ([lambda] LSPR), at least one spacer coating, at least one chemiluminescent agent having a maximum emission wavelength ([lambda] EM), and at least one biorecognition element. The signal of the chemiluminescent nanoconstruct structure is greater than the signal of only the at least one chemiluminescent agent.

A security element includes a first layer having a first surface; an array of image regions across the first surface, each including a first and a second sub-region; a first array of plasmonic nanostructures in or on the first surface across the first sub-regions and defining in each first sub-region a portion of a first image; and a second array of plasmonic nanostructures in or on the first surface across the second sub-regions and defining in each second sub-region a portion of a second image. The first surface is arranged so the sub-regions have respective average inclinations. The average inclinations of the first sub-regions result in the first image being displayed at a first viewing angle. The average inclinations of the second sub-regions result in the second image being displayed at a different second viewing angle. The second image is substantially not displayed or only partially displayed at the first viewing angle.

The invention discloses a chiral spiral gold nanorod with {111} crystal face oriented growth and a preparation method of the chiral spiral gold nanorod, and belongs to the technical field of nano materials. According to the chiral spiral gold nanorod, a single-surface gold nanorod is prepared to serve as a gold seed, then a chiral inducer is used for regulating and controlling parameters such as the proportion and concentration of a growth solution and the adding amount of a gold seed solution, and thermodynamics and dynamics of nanogold growth are regulated and controlled so as to promote formation of a spiral chiral structure and reduce generation of impurities; and finally, centrifugally purifying to obtain a high-purity product. The obtained chiral spiral gold nanorod is uniform in size and stable in chiral signal, the surface plasma resonance wavelength can be simply adjusted within the range of 700-900 nm, and the technical problems that in traditional chiral plasma nanostructure preparation, efficiency is low, the structure is unstable, and nanoscale size control is difficult to achieve are solved. The method has wide application value in the fields of chiral sensing, chiral asymmetric catalysis, plasma nano antennas and the like.

The present invention relates to a multiple beam redirection device comprising plasmonic optical nanoantennas comprising M>=2 plasmonic nanoantennas located at a distance from each other. Each nanoantenna is formed by a row of N plasmonic nanostructures, the angle θi of each nanoantenna with respect to an axis being coplanar to the nanoantenna and to the propagation vector of the electromagnetic field and perpendicular to the latter, wherein λi is a beam wavelength and D is the distance between nanostructures of a nanoantenna.

The invention relates to the technical field of nano materials and optical functional coatings, and discloses an anti-reflection light trapping colloid based on laser ablated nano powder as well as a preparation method and application of the anti-reflection light trapping colloid. The method comprises the following steps: ablating a raw material by laser to obtain nano powder with uniform particle size distribution and an oxide layer on the surface; mixing the nano powder with a solvent, a dispersing agent and / or a surfactant, and performing dispersion treatment to form stable colloid; and coating the colloid on the surface, interface or middle layer of a target device, and drying to form an antireflection and light trapping functional layer. The colloid can be used for photovoltaic solar cells, light emitting diodes (LEDs), intelligent glasses, chips, sensors and other photoelectric devices. The preparation method is simple in process and controllable in cost, the prepared colloid is stable and uniform in dispersion, interface carrier recombination is effectively inhibited through the oxide layer on the surface of the nano-powder, the problem that an existing plasma nano-structure preparation technology is high in cost is solved, and the preparation method is suitable for large-scale production and has a remarkable industrialization prospect.

A method for the spatiotemporal mapping of receptor-ligand binding kinetics in localized surface plasmon resonance (LSPR) imaging using a chip for LSPR imaging having a glass coverslip compatible for use in a standard microscope and at least one array of functionalized plasmonic nanostructures patterned onto the glass coverslip with electron beam nanolithography and projecting a magnified image of the array to a CCD camera and monitoring the binding kinetics of the array. The nanostructures can be regenerated allowing the chip to be used multiple times.

The invention discloses a molecular terahertz spectrum measurement method and system based on plasmon nano optical tweezers, and belongs to the technical field of molecular spectrum detection and nano manipulation. A local enhanced light field generated by a plasmon nano structure is utilized to capture and fix nanoparticles of a single target molecule or a loaded molecule in an aqueous solution; generating frequency-tunable terahertz waves by adopting a double-laser beat frequency technology, and coupling the terahertz waves to the local light field to excite a captured target; monitoring the optical signal change caused thereby in real time; acquiring a characteristic vibration spectrum of the target molecule by scanning the terahertz frequency; the plasmon nano optical tweezers and the optical beat frequency terahertz technology are combined, so that the terahertz vibration spectrum of the single molecule or nano particle level in the aqueous solution environment is directly measured, and the core problem that the traditional terahertz technology cannot be used for liquid-phase biological detection due to strong absorption of water is solved.

Described herein is a fluorescent nanocomposite. The fluorescent nanocomposite structure may include a plasmonic nanostructure comprising having at least one localized surface plasmon resonance wavelength (λLSPR), at least one spacer coating, at least one fluorescent agent having a maximum excitation wavelength (λEX), and at least one peptide-loaded major histocompatibility complex (MHC) molecule (pMHC). The fluorescent nanocomposite structure has a fluorescent intensity that is at least 500 times greater than a fluorescent intensity of the at least one fluorescent agent alone.

Embodiments relate to a plasmonic nanostructure with excellent color fidelity and a method for fabricating the nanostructure. According to one embodiment, by growing metal nanoparticles embedded within a dielectric matrix by a co-evaporation method, the scattering properties of the metal nanoparticles may be suppressed and the absorption properties thereof may be maintained, so that color purity may be controlled more precisely, and the colors in transmission mode and reflection mode may be tuned independently. Meanwhile, by using low-temperature process conditions, it is possible to selectively control the size, density, and degree of distribution of metal nanoparticles during deposition without performing an additional subsequent process.

A security element including a first layer having a first surface, an array of image regions across the surface, each including at least first and second sub-regions, a first array of plasmonic nanostructures in or on the surface across the first sub-regions, defining in each a corresponding portion of a first image, a second array across the second sub-regions, defining in each a corresponding portion of a second image; wherein each sub-region has a respective average inclination and the average inclinations of the first sub-regions are such that the first image is displayed at least at a first viewing angle and those of the second sub-regions are such that the second image is displayed at least at a second viewing angle different from the first and the second image is substantially not or only partially displayed at least at the first angle. Also, a method of manufacturing the security element.

A photonic integrated circuit (PIC 200), an optical system comprising such PIC and a method of processing a sample using such PIC are presented. The PIC comprising a plurality of scanning waveguides (112) and plasmonic nanostructures (114) in a tip of each of the scanning waveguides. The tip of the scanning waveguide is a part of the scanning waveguide where light exists or enters the PIC when in operation.

A neurodegenerative disorder biosensing system including at least one plasmonic device including a plurality of plasmonic nanostructures; at least one optical detector; and at least one data processing device including at least one processor configured to process a plurality of absorption spectra determined from the reflected optical infra-red spectra, the plurality of absorption spectra representing time-resolved infra-red absorption by at least one of: (i) first protein secondary structure types formed from neurodegenerative disorder aggregated proteins and (ii) second protein secondary structure types formed from neurodegenerative disorder aggregated proteins. The at least one processor configured to process the plurality of absorption spectrum signals to identify the first protein secondary structure type and the second protein secondary structure type, and to distinguish the identified first protein secondary structure type from the second protein secondary structure type, and to distinguish the identified second protein secondary structure type from the first protein secondary structure type.

Described herein is a fluorescent nanocomposite. The fluorescent nanocomposite structure may include a plasmonic nanostructure comprising having at least one localized surface plasmon resonance wavelength (λLSPR), at least one spacer coating, at least one fluorescent agent having a maximum excitation wavelength (λEX), and at least one peptide-loaded major histocompatibility complex (MHC) molecule (pMHC). The fluorescent nanocomposite structure has a fluorescent intensity that is at least 500 times greater than a fluorescent intensity of the at least one fluorescent agent alone.

The application provides a photothermal-water-voltaic synergistic effect wide-spectrum plasmonic core-shell material and a device preparation method. In the synthesis process, anisotropic plasmonic nanostructures respectively undergo aggregation in a plane and overlap in a vertical direction, which respectively causes red shift and blue shift of a surface plasmon resonance (SPR) resonance peak, and breaks through the diffraction limit to achieve wide-spectrum absorption. The thin film prepared by the application has good photothermal effect, and the existence of the oxide shell can effectively protect the plasmonic metal core from deformation caused by chemical reaction with the outside world when the temperature rises. In addition, the prepared thin film has good water-voltaic power generation capacity, and can improve the water-voltaic power generation output by using the photothermal effect under illumination.

Angle-multiplex structured-illumination imaging can be uniquely enabled by arrayed plasmonic nanostructures. The arrayed plasmonic nanostructures can be utilized as an incidence angle-multiplex near-field modulation mask and can achieve a resolution gain over the diffraction limit. Angle-multiplex structured-illumination (AMSI) can be implemented as a general technique with any arrayed plasmonic nanostructures to empower them with enhanced-resolution fluorescence in addition to label-free plasmonic sensing and imaging.

A plasmonic nanostructure includes a dielectric substrate, a periodic array of dielectric pillars on the dielectric substrate; and, on each dielectric pillar of the periodic array, a respective conductive layer. Each dielectric pillar of the periodic array of dielectric pillars is between the respective conductive layer and the dielectric substrate. A method for imaging a cell includes reflecting an optical beam off the plasmonic nanostructure. The plasmonic nanostructure has biological cells adhered thereto. The method also includes collecting the reflected optical beam with an optical detector.