Plasmonic nanopatch array with integrated metal–organic framework for enhanced infrared absorption gas sensing

Abstract

In this letter, we present a nanophotonic device consisting of plasmonic nanopatch array (NPA) with integrated metal-organic framework (MOF) for enhanced infrared absorption gas sensing. By designing a gold NPA on a sapphire substrate, we are able to achieve enhanced optical field that spatially overlaps with the MOF layer, which can adsorb carbon dioxide (CO) with high capacity. Experimental results show that this hybrid plasmonic-MOF device can effectively increase the infrared absorption path of on-chip gas sensors by more than 1100-fold. The demonstration of infrared absorption spectroscopy of CO using the hybrid plasmonic-MOF device proves a promising strategy for future on-chip gas sensing with ultra-compact size.

Metal–Organic Framework Thin Films: Fabrication, Modification, and Patterning

“…The controllable synthesis showed a linear growth rate of ZIF-8 TFs of 100 nm/coating (30 min/cycle) and presented a thickness-dependent color-changing property that was interesting in optics. The DC deposition strategy is used extensively to fabricate various MOF-TFs that are of interest in electronics and optics [16,43,[121][122][123][124].…”

“…In contrast to other porous materials, MOFs also possess designable structures that can be engineered with tailored pores for selective adsorption of specific gases [1]. Moreover, MOFs show outstanding features as in structural flexibility, thermal and chemical stability, etc., which grant MOFs great potential in numerous applications, such as gas storage and separation [2][3][4][5], liquid purification [6][7][8][9], catalysis [10][11][12][13], gas/chemical sensing [14][15][16][17][18], and energy production [19][20][21][22]. Other than direct applications, MOFs have also been used as precursors/templates for the production of inorganic functional materials with unique designability [23].…”

On-chip readout plasmonic mid-IR gas sensor

“…Some pioneered works have also explored mid-IR gas sensing. By manipulating the spatial electromagnetic field distribution, a detection limit of 60000 ppm for CO 2 was demonstrated in a 4 mm long gas cell device containing a metal microstructure array, which provides a 1100 times absorption enhancement in the optical path together with a porous metal-organic framework (MOF) 33 . By engineering the emission spectrum, an NDIR sensor with a narrowband thermal emitter based on plasmonic crystal was demonstrated with a detection limit of 10000 ppm for CO 2 in a 7.5 mm gas cell 34 .…”

Vapor phase SERS sensor based on mesoporous silica decorated with silver nanoparticles

“…At the same time, ordinary materials for SERS with ecological, pharmaceutical, biological and medical applications are commonly designed for the analysis of liquid analytes [1][2][3][4][5][6][7][8][9][10] while a limited number of actual research efforts has focused on vapor phase detection [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The latter challenge evidently widens the promising application area of SERS and therefore requires novel approaches for the design of SERS-active materials.…”

“…Accordingly, the sensitivity of the analysis becomes even higher if porous silver nanocubes [12], polymer coatings [15], anisotropic nanoparticle aggregates [16,24], metal -organic frameworks [21,26], multihole capillaries [23], graphene oxide surface [28], free -surface microfluidic chips [18], electrodynamic precipitation [17] are applied.…”