Multi-element gas sensor based on surface plasmon resonance: recognition of alcohols by using calixarene films

Abstract

Abstract. This work is devoted to development of a multi-element gas sensor based on surface plasmon resonance (SPR) to recognize some alcohols. As sensitive layers capable to change their optical properties when interacting with volatile alcohol molecules, we investigated bulk-porous sorbents -calixarenes (tret-butyl-calix[4,6,8]. Each calixarene was studied to obtain its kinetic concentration SPR characteristics for interaction with ethanol, isopropanol and penthanol vapors. To realize SPR measurements, the sensitive calixarene films (d ∼ 100 nm) were deposited on a gold film (d ∼ 45 nm) by using the method of thermal evaporation in vacuum. Experimental multi-element SPR device was designed as based on the analysis of TV image obtained for the studied array of calixarene films and tested using saturated ethanol vapors. .

Current Trends in Technology and Materials of Sensors Based on Surface Plasmon Resonance

“…These processes cause degradation of the sensitive element as well as to distorsions of measurement results as a consequence of changing the physical characteristics both of analyte and PCL. To enhance the sensitivity and selectivity of SPR sensors, they use additional organic polymer layers of calixarenes, polymethylmetacrylate, alkanthiols, complex oxides etc [48][49][50].…”

A nanostructural model of ethanol adsorption in thin calixarene films

“…Then the total volume of cavities in 1 cm 2 of the film is V 0 = M4r 3 /3. Due to the adsorption the volume of cavities decreases by the volume of adsorbed layer with the thickness  Then the cavities volume at equilibrium becomes M a n u s c r i p t (8) It was previously demonstrated in the work on development of multielement gas sensor consisting of the investigated calixarene films and surface plasmon resonance based optical transducer [17], that the dependencies of equilibrium surface concentrations of ethanol on the partial vapor pressure are approximately linear. This means that the adsorbate monolayer is not formed even at the saturated vapor pressure, i.e.…”

“…Various principles of sensor arrays organization can be used [12], utilizing different physical transducers. Sensor systems based upon the measurement of electroconductive polymers conductivity [13], quartz crystal resonator frequency [14][15][16], and various optical characteristics of thin films (optical absorption, reflection, diffusion or luminescence, using interference or resonance properties) [17][18][19] were reported in literature. At the present time, optical sensor systems are among the most promising from the standpoint of research interest and introduction into wide practice.…”

Sensitivity of Tiacalixarene Films Towards Set of the Aliphatic Alcohols

“…Останнім часом все більша увага приділяється створенню ефективних, надійних, малогабаритних та швидкодіючих газоаналітичних систем, які могли б застосовуватися для контролю навколишнього середовища, в харчовій промисловості, парфумерії, медицині, тощо [1,2]. В них використовуються різні принципи реєстрації параметрів, що базуються на зміні провідності [3], оптичних характеристик [4][5][6], частоти (кварцовий мікробаланс) [7,8], порогової напруги (газові польові транзистори) [9,10], та ін. Проте для всіх їх обов'язковим є наявність чутливої поверхні, на якій відбувається адсорбція молекул газу, що аналізується.…”