An admittance-controlled amplified force tracking scheme for collaborative lumbar puncture surgical robot system.

Background: The accurate sensing and display of the delicate needle-tissue interaction force to the operator is desirable for needle insertion procedures. It not only plays a significant role in the surgical treatment effect, but also has a great significance in improving surgical safety and reducing the incidence of complications. However, the direct detection of the interaction force between the tissue and needle tip by placement of a force sensor is challenging owing to the constraints of miniaturisation, cost, and sterilisation.

A gel fluorescence sensor based on CDs@SiO/FeS@MIPs for the visual detection of -chlorophenol.

There is a critical need for the rapid detection of -chlorophenol produced by pesticide abuse and industrial wastewater discharge, which has been an urgent problem in the realm of environmental protection. Here, a green and environmentally friendly method was developed to prepare stable and low toxicity quantum dots. First, blue-green fluorescent FeS quantum dots (B-FeS QDs) were prepared with FeCl·6HO (an iron source) and L-cysteine (a capping agent) by the solvothermal method.

A peroxidase-like nanoenzyme based on strontium(II)-ion-exchanged Prussian blue analogue derivative SrCoO/CoO nanospheres and carbon quantum dots for the colorimetric detection of tigecycline in river water.

In this work, for the first time, we derived a composite of perovskite oxide SrCoO and CoO by annealing the Prussian blue analogue exchanged with strontium ions and modified with carbon quantum dots (CQDs). Its peroxidase-like catalytic activity was explored. The peroxidase-like activity was mainly evaluated by the rate of the chromogenic reaction.

Ratiometric fluorescence determination of chlortetracycline based on the aggregation of copper nanoclusters triggered by aluminum ion.

The aggregation-induced emission (AIE) characteristic of copper nanoclusters (CuNC) was for the first time used to construct a ratiometric fluorescence probe (CuNC-Al) for detection of chlortetracycline (CTC). Aluminum ion (Al) can aggregate free CuNC and make it emit a bright and stable red fluorescence. A slight excess of Al in CuNC-Al solution can form a CTC-Al complex to limit the conformational rotation of CTC molecule and enhance CTC fluorescence.

A sensitive visual detection of thiamethoxam based on fluorescence resonance energy transfer from NH-SiO@CsPbBr to merocyanine configuration of spiropyran.

The spiropyran (SP) compound is a typical photochromic compound. Its merocyanine configuration (MC) can accept energy and be excited by visible light, while the closed-loop configuration cannot. In this work, the SP was wrapped in β-cyclodextrin (β-CD-SP) firstly.

Aspartic acid assisted one-step synthesis of stable CsPbX@Asp-CsPbX by in situ growth in NH-MIL-53 for ratiometric fluorescence detection of 4-bromophenoxybenzene.

A molecularly imprinted ratiometric fluorescent sensor was synthesized for the detection of 4-bromophenoxybenzene (BDE-3) based on perovskite quantum dots and metal organic framework. First, aspartic acid (Asp) was introduced during the synthesis of perovskite CsPbX for the formation of a core-shell structure of CsPbX@Asp-CsPbX. Due to the protection of the shell layer CsPbX, the stability of the core CsPbX was improved significantly.

Cobalt(II)-ion-exchanged Zn-bio-MOF-1 derived CoS/ZnS composites modified electrochemical sensor for chloroneb detection by differential pulse voltammetry.

For the first time CoS-nanoparticles attached ZnS rods (CoS/ZnS composites) have been synthesized using cobalt(II)-ion-exchanged zinc-based biological metal-organic framework-1 (Zn-bio-MOF-1) as precursors by a solvothermal method. Among them, the cobalt(II)-ion-exchanged Zn-bio-MOF-1 was obtained by exchanging the dimethylammonium cations (MeNH) of Zn-bio-MOF-1 with cobalt ions. A novel electrochemical sensor based on CoS/ZnS composites and molecularly imprinted polymers (MIPs) was proposed for rapid, sensitive, and highly selective detection of organochlorine pesticide chloroneb.