Entries by Katy

Research News- Dr. Elton Sores de Lima Filho NRC

Dr. Elton Sores de Lima Filho is currently a Research Officer with the Energy, Mining and Environment Research Centre (EME) at the National Research Council of Canada (NRC). His work focus is developing optical instruments for the measurement of materials properties. Dr. Soares de Lima Filho received his Ph.D. in Engineering Physics at Polytechnique Montreal and did his post-doctoral work at the […]

Bodipy-Containing Porous Microcapsules for Flow Heterogeneous Photocatalysis

Photocatalysis is a facile strategy for complex chemical transformations. Heterogeneous photocatalysis, especially in the flow system, has attracted much attention as it avoids the separation of catalysts. Herein, a kind of a Bodipy-containing porous microcapsule heterogeneous photocatalyst was rationally constructed with modulation on a multiscale. The diiodo-Bodipy with methacrylate (MA-2IBDP) was synthesized as a polymerizable […]

A Multi-Frequency pMUT Array Based on Ceramic PZT for Endoscopic Photoacoustic Imaging

This paper presents, for the first time, a multifrequency piezoelectric micromachined ultrasonic transducer (pMUT) array for endoscopic photoacoustic imaging applications. With a chip size of 3.5 × 3.5 mm 2 , the pMUT array consists of 285 pMUT elements with seven different resonant frequencies ranging from 1 MHz to 8 MHz. The pMUT array has been fabricated […]

Acoustic-resolution photoacoustic microscope based on compact and low-cost delta configuration actuator

The state-of-the-art configurations for acoustic-resolution photoacoustic (PA) microscope (AR-PAM) are large in size and expensive, hindering their democratization. While previous research on AR-PAMs introduced a low-cost light source to reduce the cost, few studies have investigated the possibility of optimizing the sensor actuation, particularly for the AR-PAM. Additionally, there is an unmet need to evaluate […]

Ambient Single-Cell Analysis and Native Tissue Imaging Using Laser-Ablation Electrospray Ionization Mass Spectrometry with Increased Spatial Resolution

Laser-ablation electrospray ionization mass spectrometry (LAESI-MS) is an emerging method that has the potential to transform the field of metabolomics. This is in part due to LAESI-MS being an ambient ionization method that requires minimal sample preparation and uses (endogenous) water for in situ analysis. This application note details the employment of the “LAESI microscope” source to […]

Microwave-Assisted Synthesis of Non-Fullerene Acceptors and Their Photovoltaic Studies for High-Performance Organic Solar Cells

This study explores the microwave-assisted cross-coupling methodology to synthesize non-fullerene electron acceptors for solution-processed organic solar cells. Herein, two molecules were designed by introducing the benzo [2,1,3] thiadiazole (BT) unit with a fused aromatic ring leading to an A–A′–D–A′–A (acceptor–acceptor′–donor–acceptor′–acceptor) architecture. The introduction of BT unit stabilizes the resonance structure and enhances the intramolecular charge […]

Passivation of Electron Trap States in InP Quantum Dots with Benzoic Acid Ligands

Low toxicity indium phosphide (InP) quantum dots represent an attractive alternative to heavy-metal-based quantum dots (QDs) in numerous applications including lighting, displays, and photosensitization. However, low photoluminescence quantum yields (PLQYs) resulting from a high density of surface trap states ultimately limit the applications of as-synthesized InP QDs in commercial products. Postsynthetic treatment with Z-type ligands […]

Optically Activatable Double-Drug-Loaded Perfluorocarbon Nanodroplets for On-Demand Image-Guided Drug Delivery

Phase-changing nanodroplets have been studied as externally activatable in situ microbubble precursors. The nanodroplets can be triggered to vaporize with an external optical or acoustic energy source, and the resulting microbubbles can be visualized with high sensitivity using ultrasound imaging. Because of their nanoscale size, this type of construct is attractive for the encapsulation and […]

Tm3+: Bi4Si3O12 crystal as a promising laser material near 2 μm: growth, spectroscopic properties and laser performance

We report on the crystal growth, spectroscopic properties and laser performance of Tm3+-doped Bi4Si3O12 (BSO) crystal. The crystal was grown by the vertical Bridgeman method. The spectroscopic properties are investigated based on absorption and luminescence spectroscopy. Judd – Ofelt (JO) analysis is performed to calculate the spontaneous emission probabilities, branching ratio and the radiative lifetimes. The […]

Detection of collagen by multi-wavelength photoacoustic analysis as a biomarker for bone health assessment

Collagen is an important biomarker of osteoporosis progression. Noninvasive, multispectral, photoacoustic (PA) techniques use pulsed laser light to induce PA signals to facilitate the visualization of chemical components that are strongly related to tissue health. In this study, the feasibility of multi-wavelength PA (MWPA) measurement of the collagen in bone, using the wavelength range of 1300–1800 nm, was investigated. First, the feasibility […]