Themed collection Sensors for health and happiness

This review provides an overview on the recent (2016–2020) findings on chemosensors based on pyrazole derivatives. The discussion focuses on the design, physicochemical properties and practical applications of probes.

The advancement of nanotechnology has provided opportunities for the development of new sensing and food packaging solutions, addressing long-standing challenges to extend shelf-life, reduce waste, assess safety and improve the quality of food.

Carbon and graphene quantum dots for biological and sensing applications of neurotransmitters.

This review presents recent progress, importance, requirements and future needs of wearable potentiometric pH sensors for healthcare applications.

Terahertz (THz = 10¹² Hz) spectroscopy has shown great potential in biomedical research due to its unique features, such as the non-invasive and label-free identification of living cells and medical imaging.

Biosensors with high sensitivity, selectivity and a low limit of detection, reaching nano/picomolar concentrations of biomolecules, are important to the medical sciences and healthcare industry for evaluating physiological and metabolic parameters.

Small-molecule fluorescent probes allow light to be used as a tool to advance the study of biology, discover new drugs, and further the detection of cancer. This tutorial review introduces important concepts related to fluorescent probe development.

We summarize the latest advances of non-enzymatic glucose detection using non-noble transition metal materials, highlighting their opportunities and challenges.

Optical temperature sensing is a promising method to achieve the contactless temperature measurement and large-scale imaging. The current status of optical thermometry of rare-earth ions doped phosphors is reviewed in detail.

In this review, we cover the recent developments in fluorogenic and chromogenic sensors for Cu²⁺, Fe²⁺/Fe³⁺, Zn²⁺ and Hg²⁺.

This paper provides a review of the recent advances made in the field of electroactive polymers and composites for biomedical applications.

In this review, the recent progress in the electrochemical sensing of dopamine with various graphene and their nanocomposite materials modified electrodes are presented.

Glucose detection is of great significance in biomedical applications. Principles, methods and recent developments in electrochemical glucose sensors are reviewed here.

This review summarizes some recent progress in the development of nanomaterials for electrochemical non-enzymatic biosensors.

We present wearable dry electrodes made of silver nanowires for long-term electrophysiological sensing such as electrocardiography and electromyography.

Hemin-doped-HKUST-1 nanozyme has been successfully synthesized and used for dopamine detection with excellent reproducibility, stability and anti-interference.

A platinum–silver graphene nanocomposite was synthesized and characterized. A nanocomposite modified electrode was fabricated in order to investigate the electrochemical detection of dopamine.

An alkali-resistant 3D anionic Zn-MOF directed by [BMI]Br ionic liquid has been synthesized for aqueous-phase detection of antibiotics and nitroaromatic explosives.

A three-dimensional paper-based microfluidic device (3D-PMED) has been developed for dynamic sweat metabolite monitoring with continuous sweat flow avoiding accumulation.

A three dimensional (3D) nanostructured composite based on the self-assembly of MoS₂ nanospheres and polyaniline (PANI) loaded on reduced graphene oxide (denoted by 3D MoS₂-PANI/rGO) was prepared via a feasible one-pot hydrothermal process.

This is a simple route to detect the selective xanthine with wet-chemically prepared co-doped ZnO/Al₂O₃/Cr₂O₃ nanomaterials by reliable electrochemical method at large scales for the safety of healthcare fields.

Based on the interaction between single-stranded probe DNA and graphene quantum dots (GQDs), we have designed a simple but smart electrochemical platform to detect HBV-DNA by using GQDs modified glassy carbon electrode coupled with probe DNA.

Nitrogen-doped carbon quantum dots prepared with microcrystalline cellulose display excellent sensitivity to Fe³⁺ via dynamic quenching in an acidic environment.

Daclatasvir (DAC) is listed on the World Health Organization's list of essential medicines needed in a basic health system, therefore, electrochemical and impedance spectroscopic methods are necessary.

Co₃O₄ nanosheets were synthesized by wet chemical technique at low-temperature in alkaline phase.

Schematic of captured antigen onto BSA/anti-CYFRA-21-1/serine/nZrO₂/ITO immunoelectrode and its electrochemical response.

Water soluble carbon quantum dots were synthesized from lemon peel waste and were used for Cr⁶⁺ detection and photocatalytic degradation of methylene blue dye.

Ternary ZnO/Ag/Mn₂O₃ nanocomposite as photocatalyst, sensing and antimicrobial material.

This work reports an ultrasensitive wearable temperature sensor based on GNWs/PDMS for personalized healthcare and human–machine interface systems.

Fluorescence turn-on sensor based on nitrogen-doped graphene quantum dots can be used for glutathione detection in living cells.

Gold nanoparticle-decorated MoS₂ nanosheets for simultaneous detection of ascorbic acid, dopamine and uric acid with high sensitivity and selectivity.

Fluorescent nitrogen-doped carbon nanoparticles (FNCPs) were synthesized by one-pot hydrothermal treatment of strawberry juice. The strategy was simple, green, and low-cost. The as-prepared FNCPs showed some excellent properties such as water-soluble and good stability, which was applied as an Hg²⁺ sensor with high sensitivity and selectivity.

Reported here is a green and facile synthesis of graphitic carbon quantum dots as a fluorescent sensing platform for the highly sensitive and selective detection of Fe³⁺ ions.

In this contribution, we demonstrate a green, cost-effective, one-pot preparative route toward Ag nanoparticles-graphene (AgNPs–G) nanocomposites in aqueous solution with the use of tannic acid (TA), an environmentally friendly and water-soluble polyphenols, as a reducing agent.