Nanotechnology Spotlight – Latest Articles

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Showing Spotlights 1 - 8 of 169 in category Sensors, Sensing Applications (newest first):

 

Flexible, implantable nutrient sensors based on metal-organic frameworks

MOFResearchers have demonstrated materials and techniques to achieve highly sensitive flexible biosensors integrated with metal-organic frameworks (MOFs) - essentially inorganic-organic hybrids that contain repeated metal ions connected with organic ligands. These high-throughput flexible devices can achieve highly specific and sensitive electrochemical detection and can be used to monitor neurotransmitters and nutrients in vivo.

Jun 13th, 2018

Eggshell membranes from bio waste could be harvesters for green energy

eggshellIn new work, researchers explore inexpensive, biodegradable and daily-waste eggshell membrane as a novel bio-piezoelectric material for harvesting green energy. The uniqueness of our work lies in the novelty of directly utilizing natural eggshell membranes as efficient piezoelectric material. This simple, innovative approach could provide huge benefits for research in future energy science, especially with regard to in vivo biomedical applications.

Jun 12th, 2018

Nature-inspired nanotechnology: skin-mimicking sensors

skin-inspired_sensorMimicking the exciting skin structure and function, researchers have designed hierarchical nanoporous and interlocked micro ridge structured polymers with gradient stiffness. The gradient elastic modulus of interlocked and micro ridge structured polymers effectively transfers the external stress and induces the large frictional contact between two polymeric layers, which facilitates their use in self-powered triboelectric sensors. Furthermore, the additional nanoporous structures in the micro ridge structured polymers lead to the effective variation of both volume and gap distance between opposing surfaces without the need of bulky spacers, resulting in ultrathin and flexible triboelectric sensors for applications in wearable electronics.

May 22nd, 2018

Point-of-care biosensor for rapid and accurate sepsis diagnosis

diagnostic_systemSepsis is the body's extreme response to an infection. It is life-threatening condition in which bacteria or fungi multiply in a patient's blood - often too fast for antibiotics to help. Without timely treatment, sepsis can rapidly cause tissue damage, organ failure, and death. A critical unmet need in combating sepsis is the lack of accurate early biomarkers that can alert clinicians to a potential life-threatening situation and allow them to take preventative action. In a new study, researchers report the development of a point-of-care platform for rapid sepsis detection, called IBS (integrated biosensor for sepsis).

Apr 12th, 2018

DNA origami as a novel avenue for creating next-generation optical voltage sensing nanodevices

DNA_origami_voltage_sensorOver the past few decades, researchers have developed various optical voltage sensing probes in order to overcome the highly invasive nature of electrode-based techniques. These voltage sensing mechanisms can be hampered by some combination of limitations including low sensitivity, slow kinetics, or heavy capacitive loading. This has motivated a group of researchers to explore DNA nanotechnology for developing novel optical voltage sensing nanodevices that convert a local change of electric potential into optical signals.They now report that a voltage can be read out in a nanopore with a dedicated Förster resonance energy transfer (FRET) sensor on a DNA origami.

Mar 26th, 2018

Drastic phase changes in topologically-engineered planar absorbers improve sensitivity of optical sensors

sensorPlasmonic metasurfaces can be designed to achieve the singular-phase condition, yet this typically requires complex electromagnetic design and low-throughput fabrication techniques such as electron beam lithography. In a new work, researchers have developed a simple and robust planar singular-phase sensing platform for remote temperature detection, which does not require nano-patterning and exhibits singular-phase behavior due to the excitation of topologically-protected Tamm surface states.

Jan 18th, 2018

Voltage-activated carbon monoxide sensor

sensorThe detection of carbon monoxide (CO) in the air is a vital issue, as CO is a highly toxic gas and an environmental pollutant. Carbon monoxide is poisonous because it blocks the binding site for oxygen in hemoglobin. It is exactly this principle - a porphyrin ring with a central iron or cobalt atom that the poisonous gas attaches to - that can be used to implement sensors to warn against carbon monoxide. While carbon monoxide sensors have been extensively researched and commercialized, none make use of a molecule that can be voltage-activated using a newly reported method.

Dec 20th, 2017

Monitor your UV exposure with an adhesive nanoplasmonic patch

sunModerate exposure to sunlight has significant health benefits, however, exposure to ultraviolet (UV) radiation also is a major risk factor for most skin cancers. That means that, while moderate exposure to sunlight is recommended, there is a fine line to walk between beneficial and harmful amounts of UV exposure. To take the guesswork out of assessing the exposure to damaging UV rays, several wearable consumer UV sensors have already hit the market. Researchers have now proposed a simple and low-cost stick-on nanoplasmonic patch made of optically active silver nanoparticles embedded in a film of nanopaper. The patch changes color once it has been exposed to a certain amount of UV light.

Nov 22nd, 2017