Self-Organized Frameworks on Textiles (SOFT): Conductive Fabrics for Simultaneous Sensing, Capture, and Filtration of Gases

Abstract

Wearable electronics have the potential to advance personalized health care, alleviate disability, enhance communication, and improve homeland security. Development of multifunctional electronic textiles (e-textiles) with the capacity to interact with the local environment is a promising strategy for achieving electronic transduction of physical and chemical information. This paper describes a simple and rapid approach for fabricating multifunctional e-textiles by integrating conductive two-dimensional (2D) metal-organic frameworks (MOFs) into fabrics through direct solution-phase self-assembly from simple molecular building blocks. These e-textiles display reliable conductivity, enhanced porosity, flexibility, and stability to washing. The functional utility of these integrated systems is demonstrated in the context of chemiresistive gas sensing, uptake, and filtration. The self-organized frameworks on textiles (SOFT)-devices detect and differentiate important gaseous analytes (NO, HS, and HO) at ppm levels and maintain their chemiresistive function in the presence of humidity (5000 ppm, 18% RH). With sub-ppm theoretical limits of detection (LOD for NO = 0.16 ppm and for HS = 0.23 ppm), these constitute the best textile-supported HS and NO detectors reported and the best MOF-based chemiresistive sensors for these analytes. In addition to sensing, these devices are capable of capturing and filtering analytes.

Theoretical realization of two-dimensional M3(C6X6)2 (M = Co, Cr, Cu, Fe, Mn, Ni, Pd, Rh and X = O, S, Se) metal–organic frameworks

“…The porous structures of conductive MOFs also provide efficient conditions for the access to active sites in the materials, which can be ideal for adatom adsorptions and diffusion in energy storage systems. Previous experimental studies have confirmed that conductive MOFs can serve as promising candidates in many applications, including electrocatalysis [31,32], energy storage systems [33,34], sensors [35,36] and electronic devices [37,38]. Nevertheless, synthesize of high quality and large-area 2D MOFs are yet among the most critical challenges toward their practical applications.…”

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

“…Instead of using functional MOFs as filter film coating on sensing materials to provide additional selectivity and/or sensitization, EC-MOFs are novel emerging materials with regular porosity and conductivity, which are promising for chemi-resistors with high sensitivity and selectivity [76,. Unlike MOX and MOX-MOFs, which still need additional thermal or photonic energy as the trigger source to activate the sensing reaction, EC-MOFs can be directly used as sensitive materials based on their regular micro-porosity, selective frameworks, high electronic conductivity, and RT activity [139,[144][145][146][159][160][161][162][163][164][165][166]. Therefore, EC-MOFs are promising components for hybrid gas sensors and will be powerful competitors for the new generation of gas sensors.…”

Stack the Bowls: Tailoring the Electronic Structure of Corannulene‐Integrated Crystalline Materials

“…Moreover,t he porosity of the prepared crystalline hybrids was maintained providing ap athway to re-enforce semiconducting behavior in typically insulating porous materials (for example,covalent organic or metal-organic frameworks (COFs/MOFs)). [11][12][13][14][15][16][17][18][19][20][21] In addition to the first report of azidealkyne 1,3-cycloaddition utilized for corannulene integration in the solid state,t he described corannulene material is the first member in the family of crystalline (purely organic) donor-acceptor (D-A) corannulene-COFs with the highest surface area among corannulene-based extended structures reported to date (Scheme 1). In combination with spectroscopic and structural analysis,w ee mployed theoretical calculations,w hich allowed us to probe charge transfer rates within the Marcus theory as af unction of pBm utual orientation for the first time,a sw ell as to shed light on the density of state distribution near the Fermi edge.…”