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(Nanowerk News) Bioactive compounds present mostly in fruit and vegetables perform different bodily functions relating to health and well-being. Their effects are considered antioxidant, antidiabetic, antiaging and anticancer, among others. Many studies are looking for ways to optimize absorption of bioactive compounds by the organism and increase their bioavailability – the proportion that enters the bloodstream after absorption. One way is to coat the compounds with another material [...]

Nanowerk News ) Heavy metals such as lead and cadmium are present in batteries, cosmetics, food and other things that are part of everyday life. They are toxic when they accumulate in the human organism, potentially causing several health problems, but detecting them in body fluids requires expensive equipment and a controlled laboratory environment. Researchers at the University of São Paulo (USP) in Brazil have now developed a portable sensor made of simple materials to detect heavy [...]

(Nanowerk News) In an article published in the journal Icarus ("Dynamical origin of the Dwarf Planet Ceres"), researchers at São Paulo State University (UNESP) and collaborators report the findings of a study reconstituting the formation of the dwarf planet Ceres. The research was conducted by Rafael Ribeiro de Sousa, a professor in the program of graduate studies in physics on the Guaratinguetá campus. The co-authors of the article are Ernesto Vieira Neto, [...]

(Nanowerk News) Vaccines can be made over 25% more effective by adding left-handed chiral gold nanoparticles as adjuvants, according to a study by an international collaboration in which Brazilian researchers took part. Three research groups collaborated on the study, one affiliated with the University of Michigan in the United States, and another with Jiangnan University in China. The Brazilian group was led by André Farias de Moura, a professor in the Chemistry Department at the [...]

(Nanowerk News) Pure quantum systems can undergo phase transitions analogous to the classical phase transition between the liquid and gaseous states of water. At the quantum level, however, the particle spins in states that emerge from phase transitions display collective entangled behavior. This unexpected observation offers a new avenue for the production of materials with topological properties that are useful in spintronics applications and quantum computing. The discovery was made by an [...]

(Nanowerk News) Quantum dots are manmade nanoparticles of semiconducting material comprising only a few thousand atoms. Because of the small number of atoms, a quantum dot's properties lie between those of single atoms or molecules and bulk material with a huge number of atoms. By changing the nanoparticles' size and shape, it is possible to fine-tune their electronic and optical properties - how electrons bond and move through the material, and how light is absorbed and emitted by [...]

(Nanowerk News) Researchers at São Paulo State University (UNESP) in Ilha Solteira have developed a film that can replace plastic in food packaging. The film is made from hydroxypropyl methylcellulose (HPMC) and bacterial cellulose scraps left over from industrial processing. Both raw materials are sustainable. They are combined to produce a biodegradable film of bacterial cellulose nanocrystals and HPMC. The product outperforms film made of HPMC alone. An article on the research [...]

(Nanowerk News) A lens that is a thousand times thinner than a human hair has been developed in Brazil by researchers at the University of São Paulo’s São Carlos School of Engineering (EESC-USP). It can serve as a camera lens in smartphones or be used in other devices that depend on sensors. “In the present technological context, its applications are almost unlimited,” says Emiliano Rezende Martins, a professor in EESC-USP’s Department of Electrical [...]

(Nanowerk News) - An optical fiber made of agar has been produced at the University of Campinas (UNICAMP) in the state of São Paulo, Brazil. This device is edible, biocompatible and biodegradable. It can be used in vivo for body structure imaging, localized light delivery in phototherapy or optogenetics (e.g., stimulating neurons with light to study neural circuits in a living brain), and localized drug delivery. Another possible application is the detection of microorganisms in [...]