Journal of Materials 新利手机客户端Chemistry Blog

MOF-based material has detection limit as low as traditional Karl Fischer titration

Researchers from Germany have deviseda new way to detect trace water in solvents.Their technique combines luminescent metal–organic frameworks (MOFs) with a magnetic core to give a system that users can see change colour then fish out of the sample once the test is complete.

Source: Royal Society of 新利手机客户端Chemistry The microparticle core contributes superparamagnetic properties to the compound,while the shell exhibits a mixed yellow luminescence originating from Eu3+ and Tb3+

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Composite materials combining multiple luminescent MOFs and superparamagnetic microparticles for ratiometric water detection
T.Wehner,M.T.Seuffert,J.R.Sorg,M.Schneider,K.Mandel,G.Sextl and K.Müller-Buschbaum
J.Mater.化学。C,2017,Advance Article

Kitchen cupboard staples used in sensors for detecting digestive disorders

Love it or hate it,Marmite might have a place in medicine.Scientists in Australia have used this British favourite,along with Vegemite and jelly,in electrodes for hydrogel-based devices that assess digestive problems in patients.

Source: Shutterstock
Toxicity shouldn't be an issue for medical devices made from Vegemite or Marmite

Stomach-related health problems are increasing: stomach cancer is the second deadliest cancer and 76.6% of people with irritable bowel syndrome (IBS) are undiagnosed.传统方法检测这些疾病,such as endoscopy,colonoscopy and surgery,are often invasive and unpleasant.One alternative is to use small devices,known as electronic capsules,that pass easily through the digestive system.However,researchers must make them using materials that will not damage the human body.

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Conducting hydrogels for edible electrodes
Alex Keller,Jonathan Pham,Holly Warren and Marc in het Panhuis
J.Mater.化学。B,2017,Advance Article
DOI: 10.1039/C7TB01247K,Paper

TheJournal of Materials 新利手机客户端Chemistry Csponsored three poster prizes at the Joint EuroCVD 21 – Baltic ALD 15 Conference,held from the 11^thto 14^thof June 2017 in Linköping,Sweden.The poster prize winners were Richard O'Donoghue from Ruhr University Bochum for the poster titled "Gallium amide: the Resurrection Towards New Functional Materials",Véronique Cremers from Ghent University for the poster titled "ALD oxidation barrier for Cu and Fe powder",and Fouzi Addou from Université de Toulouse for the poster titled "Compatibility of MOCVD Cu metallization with polymer pretreatments developed for other deposition processes".Congratulations to these winners and to the organisers for a successful conference.

For more information about future events,follow @euroCVD on twitter.

A method to chemically save information in quaternary code using dyes could change how we approach data storage

Source: © Royal Society of 新利手机客户端Chemistry The researchers used their quaternary code to save and read different RNA nucleotide sequences (top) and could even create more intricate patterns like an owl

A flexible,transparent polymer film endowed with two small molecules can glow in three different colours,enabling data storage in a quaternary code.This chemical approach to data storage could allow more information to be stored in a smaller space than is possible with binary systems.

Modern storage devices need to be portable,robust and capable of carrying large amounts of data.One way to store information is through optical data storage.Data is recorded by making patterns that can be read back with the aid of light.Most techniques use binary code – systems that allow two different states,1 and 0,for each data unit – to store information.Efforts have been made to increase the amount of information that these systems can store,mainly by physically reducing the size of each data unit.However,increasing the number of states each data unit could adopt,such as ternary (0,1,2) data storage,may lead to an exponential increase in information density.

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Beyond binary: optical data storage with 0,1,2,and 3 in polymer films
Peiran Wei,Bowen Li,Al de Leon and Emily Pentzer
J.Mater.化学。C,2017,Advance Article
DOI: 10.1039/C7TC00929A,Paper