6533b821fe1ef96bd127b7db

RESEARCH PRODUCT

Nanomaterials and phase sensitive based signal enhancment in surface plasmon resonance

Saeideh Mohammadzadeh-aslAhmad KeshtkarJafar Ezzati Nazhad DolatabadiMiguel De La Guardia

subject

Materials scienceNanostructureBiomedical EngineeringBiophysicsNanoparticleNanotechnology02 engineering and technology01 natural sciencesSignalPhase TransitionNanomaterialsElectrochemistryAnimalsHumansNanotechnologySurface plasmon resonancechemistry.chemical_classificationBiomolecule010401 analytical chemistryProteinsEquipment DesignGeneral MedicineSurface Plasmon Resonance021001 nanoscience & nanotechnologyNanostructures0104 chemical scienceschemistryMetalsQuantum dotMagnetic nanoparticles0210 nano-technologyBiotechnology

description

Measurement of small molecules in extremely dilute concentrations of analyte play an important role in different issues ranging from food industry to biological, pharmaceutical and therapeutical applications. Surface plasmon resonance (SPR) sensors can be a suitable choice for detection of small molecules based on interactions with biomolecules. However, sensitivity of the system for detection of these molecules is very low. Improving sensitivity has been a challenge for years. Therefore, different methods have been used to enhance SPR signals. The SPR signal enhancement using numerous nanomaterials has provided exciting results. Among various nanomaterials, metal nanoparticles (for instance gold, silver and magnetic nanoparticles), quantum dots, nanorads, and carbon-based nanostructures have got much attention due to ease in fabrication, appropriate size and shape. In addition to the advantages provided by using nanomaterials, signal enhancement provided by the appropriate use of phase information of the reflected light could be also important to improve SPR sensitivity. Phase-sensitive SPR sensors are able to detect infinitesimal changes in external properties of target while traditional type of SPR cannot demonstrate these changes. This article provides an overview on signal enhancment in SPR using nanomaterials and properties of light. We also discuss on recent progresses of the field, describing basic concepts concerning nanostructures as well as phase-sensitive sensors as platform for enhancement of signal in SPR.

https://doi.org/10.1016/j.bios.2018.03.051