Results 11 to 20 of about 113,700 (152)

Recent Advances in Wearable Potentiometric pH Sensors [PDF]

open access: yesMembranes, 2022
Wearable sensors reflect the real–time physiological information and health status of individuals by continuously monitoring biochemical markers in biological fluids, including sweat, tears and saliva, and are a key technology to realize portable ...
Yitian Tang   +11 more
doaj   +2 more sources

Visual pH Sensors: From a Chemical Perspective to New Bioengineered Materials [PDF]

open access: yesMolecules, 2021
Many human activities and cellular functions depend upon precise pH values, and pH monitoring is considered a fundamental task. Colorimetric and fluorescence sensors for pH measurements are chemical and biochemical tools able to sense protons and produce
Luigi Di Costanzo, Barbara Panunzi
doaj   +2 more sources

Micro-Sized pH Sensors Based on Scanning Electrochemical Probe Microscopy [PDF]

open access: yesMicromachines, 2022
Monitoring pH changes at the micro/nano scale is essential to gain a fundamental understanding of surface processes. Detection of local pH changes at the electrode/electrolyte interface can be achieved through the use of micro-/nano-sized pH sensors ...
Muhanad Al-Jeda   +2 more
doaj   +2 more sources

Synthesis and Purification of Lipid-conjugated Fluorescent pH Sensors [PDF]

open access: yesBio-Protocol, 2023
Lipid-conjugated pH sensors based on fluorophores coupled to lipids are a powerful tool for monitoring pH gradients in biological microcompartments and reconstituted membrane systems.
Wiebke Wiesner   +2 more
doaj   +2 more sources

Laser-Induced Graphene Electrodes for Flexible pH Sensors [PDF]

open access: yesNanomaterials
In the growing field of personalized medicine, non-invasive wearable devices and sensors are valuable diagnostic tools for the real-time monitoring of physiological and biokinetic signals.
Giulia Massaglia   +3 more
doaj   +2 more sources

Nanomechanical DNA Origami pH Sensors [PDF]

open access: yesSensors, 2014
Single-molecule pH sensors have been developed by utilizing molecular imaging of pH-responsive shape transition of nanomechanical DNA origami devices with atomic force microscopy (AFM).
Akinori Kuzuya   +5 more
doaj   +3 more sources

Excitation-Dependent pKa Extends the Sensing Range of Fluorescence Lifetime pH Sensors [PDF]

open access: yesSensors
Biological activity is strongly dependent on pH, which fluctuates within a variety of neutral, alkaline, and acidic local environments. The heterogeneity of tissue and subcellular pH has driven the development of sensors with different pKa values, and a ...
Emily P. Haynes   +2 more
doaj   +2 more sources

Synthesis and Characterization of N-Isopropylacrylamide Microspheres as pH Sensors [PDF]

open access: yesSensors, 2021
Swellable polymer microspheres that respond to pH were prepared by free radical dispersion polymerization using N-isopropylacrylamide (NIPA), N,N′-methylenebisacrylamide (MBA), 2,2-dimethoxy-2-phenylacetylphenone, N-tert-butylacrylamide (NTBA), and a pH ...
Barry K. Lavine   +8 more
doaj   +2 more sources

Micro- and Nanofluidic pH Sensors Based on Electrodiffusioosmosis [PDF]

open access: yesMicromachines
Recently, various kinds of micro- and nanofluidic functional devices have been proposed, where a large surface-to-volume ratio often plays an important role in nanoscale ion transport phenomena.
Tadashi Takagi   +2 more
doaj   +2 more sources

Genetically Encoded Ratiometric pH Sensors for the Measurement of Intra- and Extracellular pH and Internalization Rates [PDF]

open access: yesBiosensors, 2022
pH-sensitive fluorescent proteins as genetically encoded pH sensors are promising tools for monitoring intra- and extracellular pH. However, there is a lack of ratiometric pH sensors, which offer a good dynamic range and can be purified and applied ...
Lennard Karsten   +6 more
doaj   +2 more sources

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