Metal–organic framework-based micropipette is a metal ion responsive nanochannel after adsorbing H₂S

Abstract

Glass micropipette has characteristics of easy fabrication, excellent flexibility and stable properties. The HKUST-1 and MIL-68(In) in-situ grow into the tip of micropipette to construct the porous nanochannel. After absorbing...

Hierarchically engineered nanochannel systems with pore-in/on-pore structures

“…Diverse functional sites in their uniform angstrom-sized pores can enhance the specific binding between ions and the pore walls, making them increasingly achieve exceptional ion transport properties [15][16][17][18] . Taking advantage of the confined growth of porous crystal materials in nanochannels through in-situ growth [19][20][21][22] and seedingfacilitated interfacial growth 23 , an ultraselective and fast ion channel is likely to be established 24 . This allows the direct elucidation of the ion transport mechanism and explorations for broad electrochemical applications.…”

Sensitive Current Sensor Based on a Lanthanide Framework with Lewis Basic Bipyridyl Sites for Cu2+ Detection

“…The current sensor, ACBP-6-functionalized sensor (ACBP-6-MP), was prepared according to the literature. 23 The glass micropipette was fabricated using a P-97 micropipette puller. The rich silicohydroxyl groups on the inner surface of the tip of this glass micropipette were transformed into carboxyl groups by using 3-(triethoxysilyl)propylsuccinic anhydride (TESP-SA).…”

“…This study opens the door for the construction of a variety of artificial ion channels with adjustable selectivity for metal ions. Shortly thereafter, the same group modified MIL-68­(In) on the glass micropipette and adsorbed H 2 S to obtain metal ion-binding sites to construct metal ion-responsive nanochannels for efficient detection of Hg 2+ . Despite such progress, this method is still in its infancy, and rationally designing and synthesizing novel porous MOFs with functional coordination sites for specific metal ion recognition are still in high demand.…”

A DNA-Schiff base functional nanopore sensing platform for the highly sensitive detection of Al3+and Zn2+ions

“…[11][12][13] Recently, the highly sensitive and selective detection of K + , 14 Ag + , 15 Hg 2+ , 16 Zn 2+ , 17 and other ions has been realized by combining DNA and protein molecules, gold nanoparticles, and metal-organic frameworks (MOFs) with artificial nanopores. [18][19][20] With sequence programmability, precise base-pairing property, conformation diversity, and easy chemical modification, DNA nanostructures have become one of the most attractive nanomaterials. 21,22 The combination of DNA nanotechnology and nanopore sensing technology greatly promotes research on target molecules or ion detection.…”

“…11–13 Recently, the highly sensitive and selective detection of K + , 14 Ag + , 15 Hg 2+ , 16 Zn 2+ , 17 and other ions has been realized by combining DNA and protein molecules, gold nanoparticles, and metal–organic frameworks (MOFs) with artificial nanopores. 18–20…”