A multi-analyte biosensing platform with ultra-high resolution ( = 0.2 ng/mL),-which is appropriate for the detection in the human serum of a wide range of biomarkers, e.g. those allowing the lung cancer early diagnosis, has been designed. The platform is based on a new configuration of planar ring resonator. The very strong light-matter interaction enabled by the micro-cavity allows a record limit-of-detection of 0.06 pg/mm(2), five times better than the state-of-the-art. The device with footprint = 2,200 μm(2) for each ring, due to its features, has the potential to be integrated in lab-on-chip microsystems for large-scale screenings of people with high risk of developing cancer.
Plasmonic metasurfaces (PMs) exhibit extraordinary optical response due to surface lattice resonance, which is crucial for realizing high-performance photovoltaic device preparation. In this work, a nanopore confinement effect-mediated MOF@UsAu is proposed as a novel PM heterojunction for photovoltaic interfaces. 2D MOFs have the unique advantage of a tunable and ordered porous structure.
A novel phthalocyanine-based hybrid nanofilm is for the first time successfully applied as an oxidative platform for surface enhanced Raman spectroscopy (SERS) sensing to fine-resolve Raman-inactive compounds. The hybrid is formed by self-assembly of zinc(II) 2,3,9,10,16,17,23,24-Octa[(3',5'-dicarboxy)-phenoxy]phthalocyaninate (ZnPc*) with the solid-supported monolayer of graphene oxide (GO) mediated by zinc acetate metal cluster. Atomic force microscopy, UV-vis and fluorescence spectroscopies confirm that this simple coordination motive in combination with molecular structure of ZnPc* prevents contact quenching of the light-excited triplet state through aromatic stacking with GO particles.
Most molecules and dielectric materials have characteristic bond vibrations or phonon modes in the mid-infrared regime. However, infrared absorption spectroscopy lacks the sensitivity for detecting trace analytes due to the low quantum efficiency of infrared sensors. Here, we report mid-infrared photothermal plasmonic scattering (MIP-PS) spectroscopy to push the infrared detection limit toward nearly a hundred molecules in a plasmonic nanocavity.
Acute myocardial infarction (AMI) is one of the most common causes of sudden death in cardiovascular disease, and myoglobin (Myo) is the first protein to be released in the blood after the attack, which is an important biomarker for clinical detection of AMI. The "Golden Rescue Time" for acute myocardial infarction is to intervene within the first 30 min after the attack; therefore, a rapid and accurate Myo detection method is needed urgently. In this study, we designed a combined enzyme-linked immunosorbent assay (ELISA) technique with surface-enhanced Raman scattering (SERS) immunoassay (ELI-SERS), which integrates the small sample volume, ease of operation, and excellent linearity of ELISA while utilizing the SERS technique and selecting the molecule with the Raman signal (IR-808), which is in resonance with the excitation wavelength, for further signal enhancement.
Penicillin G detection is of great significance in medical research and disease diagnosis. Liquid crystal (LC), as a branch of sensitive materials, has a broad application prospect in the field of biosensing. Herein, a liquid crystal-coated silica microbubble resonator (LC-MBR), with high sensitivity for penicillin G detection, has been proposed and demonstrated.
