Plasmonic color filtering has provided a range of new techniques for “printing” images at resolutions beyond the diffraction‐limit, significantly improving upon what can be achieved using traditional, dye‐based methods. Here, approach to high‐density data encoding is demonstrated full color, dual‐state plasmonic nanopixels, doubling amount information that stored in unit‐area. This technique used encode two sets into single set pixels first time, generating vivid, near‐full sRGB (standard...

Abstract In recent years, rare earth ions doped optical materials have been extensively utilized in anticounterfeiting, temperature measurement, and other fields. However, it is difficult for single‐mode photoluminescence to meet the increasingly complex anticounterfeiting needs practice. this article, Yb 3+ /Er codoped Y 2 WO 6 multifunctional microparticles designed prepared, which can emit multimode luminescence are used measurement. Under excitation at 254, 365, 980 nm, :Yb blue, green,...

Owing to its high reliability and accuracy, the ratiometric luminescent thermometer can provide non-contact fast temperature measurements. In particular, nanomaterials doped with lanthanide ions achieve multi-mode luminescence measurement by modifying type of excitation light source. The better penetration near-infrared (NIR) photons assist bio-imaging replace thermal vision cameras for photothermal imaging. this work, we prepared core-shell cubic phase ions, Ba2LuF7 Er3+/Yb3+/Nd3+ as core...

Threshold reduction and emission enhancement are reported for a gold nanoparticle-based waveguided random laser, exploiting the localized surface plasmon resonance excitation. It was experimentally found that proper thickness of spacer layer between nanoparticles gain enhances laser performance. tunes coupling polymer avoids quenching in close contact to which is considered as one main sources loss current system.

A monolithic active optical resonator biosensor is fabricated for label-free sensing. The all-polymer sensor consists of a polymer distributed feedback (DFB) laser and hydrogel recognition layer. Specific binding analyte modulates the effective refractive index, shifting emission wavelength. Real time detection avidin–biotin interactions demonstrated as model new biosensing principle. As service to our authors readers, this journal provides supporting information supplied by authors. Such...

The two complementary technologies of colloidal upconverting nanoemitters and maskless photolithography are exploited to fabricate nanoengineered optically active surfaces for anticounterfeiting applications based on the multiphoton absorption phenomenon in lanthanide nanocomposites with a visualization wavelength NIR. It is demonstrated that unique optical, thermal, temporal characteristics these versatile surface distinguishes them from their counterparts. A behavior captured ability...

Tumor hypoxia is a major challenge in photodynamic therapy (PDT) of cancer because PDT efficacy strongly depends on oxygen availability. Here, we report the first fabrication an on-demand oxygen-releasing solid lipid nanoplatform comprising IR780 and CaO2 nanoparticles (IRCa@SLN) with average size 94.5 ± 2.1 nm to enhance efficacy. Low-power photothermal activation IRCa@SLN by 200 mW, 808 laser enabled release. The laser-activated locally generated reactive species (ROS) through interaction...

We report on the influence of localized surface plasmon resonance excitation Au@SiO2 core–shell nanoparticles amplified spontaneous emission a semiconductor polymer composite (F8BT/MEH-PPV). are compatible with donor–acceptor matrix and get uniformly distributed within whole film. The band correlates both spectra composite, as well donor acceptor spectra. demonstrate that resonantly excited enhance modal gain films. measurement influential factors reveals is enhanced predominantly by...

In 2001, Iran established a council for the development of nanotechnology and started formulating plan. The country faces both opportunities threats with respect to nanotechnology. This article presents four possible scenarios in Iran, evaluates effectiveness these different strategies country.

Nanophotonic biosensors capable of being excited in the NIR spectrum have applications various sectors. Here, we develop a 980 nm-excitable nanophotonic sensor for real-time oxygen detection both water and air by analyzing photoluminescence lifetime intensity using nanocomposite lanthanide-doped NaYF4:Yb3+,Tm3+ upconversion nanoparticles PtTFPP platinum porphyrin complex polystyrene matrix. Excellent overlap between emission excitation band guarantees 68% efficient molecules with nm laser....

We demonstrate plasmonically nano-engineered coherent random lasing and stimulated emission enhancement in a hybrid gain medium of organic semiconductors doped with core-shell plasmonic nanoparticles. The is composed 300 ± 2 nm thin waveguide an semiconductor, 53 gold nanoparticle cores, isolated within silica shells. Upon loading the nanoparticles, threshold amplified spontaneous reduced from 1.75 μJ cm-2× 102 for undoped medium, to 0.35 highly concentrated spikes narrower than 0.1 are...

Oxygen is one of Earth's vital elements, and its accurate measurement crucial in numerous scientific medical applications. Photonic-based sensors have recently become the subject great attention for oxygen measurements due to their highly promising characteristics. These include lack requirement repetitive calibrations replacement parts, being contactless, accuracy, fast response, potential fabricate such small sizes. Here, we develop a dissolved-oxygen sensor by integrating time-resolved...

Alzheimer's disease is considered as multi-factor diseases, the main hallmarks of which are extracellular amyloid-beta and intracellular tau protein aggregations, leading to neural death. With this in mind, most studies have been focused on eliminating these aggregations. Fulvic acid one polyphenolic compounds exhibits strong anti-inflammation anti-amyloidogenic effects. On other hand, iron oxide nanoparticles able reduce/eliminate amyloid Here in, effect fulvic acid-coated iron-oxide...

Photoluminescence enhancement of CdSe/CdS/ZnS QDs by localized surface plasmon resonance large Au-NPs has been investigated. The photoluminescence the with an emission wavelength at 620 nm in a PMMA matrix is enhanced immobilized Au-NPs. By considering lifetime and excitation dependent we realized that rate enhancements both contributed to total enhancement. PL measurements were carried out for different sizes find their influences on QDs. largest achieved applying 80 Silanization method...