Abstract:
Provided herein are Raman active particles and methods for their preparation and use. The particles can include a SERS-active material that is at least partially encased within a spherical porous hollow casing. In some embodiments, this can be especially advantageous when employed for water analysis and/or being employed in combination with silica particles
Abstract:
Catalysts and methods for making cyclic carbonates are disclosed. The catalyst may include at least one polymer quaternary ammonium salt, at least one metal halide and silica gel. The method of making the cyclic carbonates may include forming a mixture that includes the catalyst and an epoxide, and contacting the mixture with carbon dioxide in a reactor under conditions to form the propylene carbonate.
Abstract:
Methods and catalyst compositions for oxidizing CO to CO 2 at low temperatures are disclosed. In one embodiment, a method of oxidizing CO to CO 2 may involve heating a gaseous mixture comprising at least CO and O 2 with a catalyst mixture comprising Pd disposed on a Mn 3 O 4 mesoporous support at a temperature of about 0 °C to about 60 °C, and wherein the CO to CO 2 conversion rate is about 40% to about 100%.
Abstract:
Methods of making metal oxide-graphene composites are disclosed. The methods can include, for example, providing a composition including graphene oxide and at least one substrate, the composition being dispersed in a liquid medium. The methods can also include, for example, providing a composition including graphene oxide and at least one substrate, heating the composition, and cooling the composition. Compositions useful for performing the methods and composites obtained by the process are also disclosed.
Abstract:
The invention provides photoluminescent compounds, reactive intennediates used to synthesize photoluminescent compounds, and methods of synthesizing and using photoluminescent compounds, among others. The compounds comprise phenanthrene and dipyridylamine moieties. The compounds are colored and fluoresce upon excitation. Methods are included for using the compounds to detect metal ions by spectral changes of wavelength shift or a change in fluorescence intensity. Compositions in polymers and solvents are provided for use as a film, paint, reflective surfaces, and electroluminescent devices are provided.
Abstract:
Composite materials, methods of making the composite materials, and optical devices including the composite materials are described herein. The composite materials include a chiral nematic liquid crystal and a crosslinked polymer. The composite materials form bistable liquid crystals and have a liquid crystal blue phase with a stability range greater than 60°C.
Abstract:
Methods for the non-hot-injection synthesis of semiconductor nanocrystals are described. For example, a multi-podal cadmium selenide nanocrystal may be produced by a method including heating a degassed mixture comprising cadmium oxide, selenium, trioctylphosphine, and a carboxylic acid in a non-coordinating solvent from about room temperature to about 210°C, where the multi-podal cadmium selenide nanocrystal may be a tetrapodal cadmium selenide nanocrystal.
Abstract:
Methods, apparatuses and kits using nanoparticles for detecting plasticizers in a sample are provided. The nanoparticles have one or more attached sensing moieties comprising one or more uridine 5'-triphosphate groups, 2'-deoxythymidine 5'-triphosphate groups, etc..
Abstract:
Biopesticide compositions, and methods and kits for their preparation from lignin are disclosed. A biopesticide may include a modified lignin chelated with one or more pesticides, the one or more pesticides having at least one acidic pesticide. The modified lignin may have one or more functional groups. Methods of producing a biopesticide may include obtaining a lignin, contacting the lignin with one or more bacteria under conditions suitable for producing a modified lignin, and chelating the modified lignin with one or more pesticides, the one or more pesticides having at least one acidic pesticide.
Abstract:
Disclosed herein are methods and systems for recovering carbon fibers from objects. The object may include carbon fibers and resin. The object may be contacted with an electric current to separate the carbon fibers from the resin.