Electro-photonic tweezer captures and detects trace amount of nanoplastics through surface-enhanced Raman scattering

06-Mar-2023

Nanoplastics are plastics that have been discarded from our daily lives and that enter ecosystems in the size scale below 1 micro-metter after their physical and chemical disintegration. Recent research has shown that the concentration of microplastics in the major rivers in South Korea is the ...

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Sensor can identify the global content and form of arsenic-containing molecules at very low concentrations

02-Mar-2023

It is a cruel paradox that on a planet with a surface mostly covered by water, hundreds of millions of people don’t have access to clean drinking water. As for the pollution of potable and natural water sources, one of the main culprits is arsenic, an abundant and toxic element in the earth’s ...

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Ingredient lists often aren’t accurate

29-Aug-2022

From life-like faces to elaborate nature scenes, tattoos are a true art form. Although people have decorated their bodies for millennia for ceremonial and religious reasons, many people today adorn themselves with these images as a form of self-expression. But the inks used for tattoos are ...

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The most common plastic materials were polyethylene and PVC

06-Jul-2022

Scientists from the Leibniz Institute for Baltic Sea Research Warnemünde (IOW) for the first time analysed a long-term sample series on microplastic pollution in the Northeast Atlantic from 2000 m water depth with respect to number, size, mass, material and possible origin of the particles. ...

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A novel Raman chemical sensor made from noodlelike threads of gold

27-Jun-2022

Researchers created a special ultrathin sensor, spun from gold, that can be attached directly to the skin without irritation or discomfort. The sensor can measure different biomarkers or substances to perform on-body chemical analysis. It works using a technique called Raman spectroscopy, where ...

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The new nano-sensors employ a 1970s discovery

08-Jun-2022

Researchers at Karolinska Institutet in Sweden have developed a tiny sensor for detecting pesticides on fruit in just a few minutes. The technique, described as a proof-of-concept in a paper in the journal Advanced Science, uses flame-sprayed nanoparticles made from silver to increase the signal ...

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A team from the UNIGE has succeeded in visualizing crystal nucleation - the stage that precedes crystallization - that was invisible until now

26-Apr-2022

At the interface between chemistry and physics, the process of crystallization is omnipresent in nature and industry. It is the basis for the formation of snowflakes but also of certain active ingredients used in pharmacology. For the phenomenon to occur for a given substance, it must first go ...

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Subsidiaries SpectraSensors and Kaiser Optical Systems merge into Endress+Hauser Optical Analysis

11-Jan-2022

Effective 1 January 2022, the Endress+Hauser subsidiaries SpectraSensors, Inc. and Kaiser Optical Systems, Inc. have joined forces to form a new company: Endress+Hauser Optical Analysis, Inc. By consolidating its expertise in the field of laser-based measurement technology, the Group is ...

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Standardized methods facilitate the evaluation of Raman spectra

15-Dec-2021

Light-based methods are increasingly used for analytical problems in the fields of health, environment, medicine and safety. Raman spectroscopy is a suitable method in this context. The measurement data collected in this process are complex and extensive molecular fingerprints. Artificial ...

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Interference leads to inaccurate Raman spectroscopic analysis of vitamin B12

25-Aug-2021

Many natural products are complicated organic molecules. Despite this complexity, scientists are usually able to investigate them using spectroscopic techniques. However, a team of researchers has now discovered that care should be taken using Raman spectroscopy to analyze certain chiral ...

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