In this work, an Android application for measurement of nitrite concentration and pH determination in combination with a low-cost paper-based microfluidic device is presented. The uses seven sensing areas, containing the corresponding immobilized reagents, to produce selective color changes when sample solution placed sampling area. Under controlled conditions light, using flash smartphone as light source, image captured built-in camera processed customized algorithm multidetection colored...

The bulk of the currently available biosensing techniques often require complex liquid handling, and thus suffer from problems associated with leakage contamination. We demonstrate use an organic electrochemical transistor for detection lactate (an essential analyte in physiological measurements athlete performance) by integration a room temperature ionic gel-format, as solid-state electrolyte.

Abstract Spiropyrans are one of the most popular classes photochromic compounds that change their optical and structural properties in response to external inputs such as light, protons metal ions, making them ideal molecules for fabrication multifunctional stimuli‐responsive materials. Nowadays, emphasis polymeric materials incorporating spiropyran units focuses on effectiveness reversible photonic stimuli. Photo‐control a range key characteristics flow systems, wettability, permeability,...

Versatile sensing matrixes are essential for the development of enzyme-immobilized optical biosensors. A novel three-dimensional titanium dioxide nanotubes/alginate hydrogel scaffold is proposed detection sweat biomarkers, lactate, and glucose in artificial sweat. Hydrothermally synthesized nanotubes were introduced to alginate polymeric matrix, followed by cross-linking nanocomposite with dicationic calcium ions fabricate platform. Rapid colorimetric (blue color signal) was carried out both...

Traditional cell culture methods face significant limitations in monitoring secretions with spatial and temporal precision. Advanced microsystems incorporating biosensors have been developed to address these challenges, but they tend lack versatility, their complexity, along the requirement for specialized equipment, limits broader adoption. CellStudio offers an innovative, user-friendly solution that exploits Printing Vacuum Lithography combined bead-based assays create modular tunable...

A microfluidic chip with an integrated planar microcoil was developed for Nuclear Magnetic Resonance (NMR) spectroscopy on samples volumes of less than a microliter. Real-time monitoring imine formation from benzaldehyde and aniline in the microreactor by NMR demonstrated. The reaction times can be set 30 min down to ca. 2 s, latter being mixing time chip. Design rules will described optimize detection coil order deal inherent sensitivity minimize magnetic field inhomogeneities obtain...

The fabrication and characterization of an all-solid photonic bandgap fiber is reported. presents a low-loss region (< 20 dB/km) around 1550 nm can be used as single-mode even for core diameter large microm. zero dispersion at the short wavelength edge bandgap. measured polarisation mode dependent but remains small (few ps/km1/2). This opens possibility to realize area with doped or Bragg gratings.

We report an enzymatic sensor based on organic electrochemical transistor that uses a room temperature ionic liquid as integral part of its structure and immobilization medium for the enzyme mediator.

We report the design, fabrication, and characterization of practical microfluidic valves fabricated using laser printer lithography. These optofluidic are opened by directing optical energy from a solid-state laser, with similar power characteristics to those used in CD/DVD drives, spot printed toner where localized heating melts an orifice polymer layer as little 500 ms, connecting previously isolated fluidic components or compartments. Valve functionality, response time, input dependence...

We present the fabrication, characterisation and performance of four novel ionic liquid polymer gels (ionogels) as photo-actuated valves incorporated into micro-fluidic manifolds. The ionogels incorporate benzospiropyran units phosphonium-based liquids. Each ionogel is photo-polymerised in situ channels a poly(methyl methacrylate) device, generating manifold incorporating different micro-valves. are actuated by simply applying localised white light irradiation, meaning that no physical...

Up to now, photoresponsive hydrogels and ionogels based on poly(N-isopropylacrylamide) copolymerised with pendant spiropyran groups require exposure external acidic solution (usually milimolar HCl) generate the swollen gel prior photo-triggered contraction. This serious functional limitation has been solved by copolymerising acrylic acid into matrix, provide an internal source of protons. Due relative pKa values merocyanine isomers, protonation deprotonation occurs internally within there is...

Here we present a fast and cheap prototyping technique for the realisation of paper-based microfluidic devices simply by using stamp indelible ink. The proposed mechanism involves contact stamping ink to laboratory filter paper PDMS stamp, which defines structure. It is cleanroom washing steps-free method provides reproducible production functional in single step less than 10 s. fully characterised concept has been applied, as proof-of-principle, low-cost colorimetric glucose sensor.

The controlled movement of a chemical container by the light-activated expulsion fuel, named here "photo-chemopropulsion", is an exciting new development in array mechanisms employed for controlling microvehicles, herein represented lipid-based microdroplets. This "chemopropulsion" effect can be switched on and off, fully reversible. As service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may re-organized online...

Platelet-Rich Plasma, also known as PRP, is an autologous biologic product used in medicine a treatment for tissue repair. Nowadays, the majority of PRP obtention methods enrich only platelets, not considering extraplatelet biomolecules, which take part several cell processes. In present work, novel preparation method was developed to obtain rich both platelet and plasma molecules. The based on evaporation water using rotary evaporator. With this new methodology increase plasmatic growth...

Fused silica microcapillaries were functionalized with spiropyran-polymer brushes using surface-initiated ring-opening metathesis polymerization. Based on the inherited spiropyran properties, capillaries successfully used to photoidentify solvents of different polarity when passing through microcapillary in continuous flow. In present study, six (toluene, tetrahydrofuran, acetone, acetonitrile, ethanol, and methanol) can be easily detected while modified by simply irradiating a portion it UV...

This work describes the first use of a wireless paired emitter detector diode device (PEDD) as an optical sensor for water quality monitoring in lab-on-a-disc device. The microfluidic platform, based on ionogel sensing area combined with low-cost sensor, is applied quantitative pH and qualitative turbidity samples at point-of-need. autonomous capabilities PEDD system, portability communication full device, provide flexibility needed on-site testing. Water from local fresh brackish sources...

This paper reports for the first time use of a cross-linked poly(N-isopropylacrylamide) ionogel encapsulating ionic liquid 1-ethyl-3-methylimidazolium ethyl sulphate as thermoresponsive and modular microfluidic valve. The presents superior actuation behaviour to its equivalent hydrogel. Ionogel swelling shrinking mechanisms kinetics are investigated well performance when integrated valve in device. demonstrates fully reversible on-off without failure up eight cycles pressure resistance 1100 mbar.