Gated Silica Mesoporous Materials in Sensing Applications

Area of Science:

• Materials Science
• Nanotechnology
• Analytical Chemistry

Background:

• Silica mesoporous supports (SMSs) offer large surface areas and volumes, making them suitable for chemical substance delivery.
• Gated SMSs enable controlled cargo release via stimuli, with prior applications mainly in drug delivery.
• The use of SMSs in sensing, particularly gated versions, is less explored but promising.

Purpose of the Study:

• To compile and review published examples of sensing probes based on capped silica mesoporous supports.
• To highlight the application of gated SMSs in detecting various analytes.
• To showcase the versatility of these materials in recognition protocols.

Main Methods:

• Systematic literature review of capped silica mesoporous supports used for sensing.
• Categorization of sensing applications based on detected analytes (anions, cations, small molecules, biomolecules).
• Analysis of the design principles and stimuli-responsive mechanisms of gated SMSs for sensing.

Main Results:

• Numerous examples of capped SMSs designed for sensing applications were identified.
• These SMS-based probes demonstrate effective detection of diverse analytes.
• The mechanism involves loading pores with reporters and using stimuli-responsive capping for analyte-triggered release.

Conclusions:

• Capped silica mesoporous supports represent a versatile platform for developing novel sensing probes.
• Their application in sensing protocols is expanding beyond drug delivery.
• The diverse range of gated SMSs underscores their significant potential in chemical and biological recognition.