Massachusetts Institute of Technology

Colgate Palmolive Company

Preston T Snee

Moungi G Bawendi

Daniel G Nocera

Rebecca C Somers

Long Pan

Donghui Wu

Venda Porter Maloney

Armen Shamirian

Yin Thai Chan

The present disclosure is directed to a sensing agent. The sensing agent comprises a quantum dot; and a dye moiety coupled to the quantum dot. The sensing agent is capable of sensing at least one analyte chosen from hydrogen sulfide (HS) and bisulfide. Sensors made from the sensing agents are also disclosed.

Ratiometric quantum dot-rhodamine B sensing compound and device made from the compound

An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in optical communication with the optical feedback structure. The chromophore can be a semiconductor nanocrystal. The resonator can provide laser emission when excited.

Optical feedback structures and methods of making

Binding an analyte can cause a change in fluorescence emission of a sensor. The change in fluorescence can be related to the amount of analyte present. The sensor can include a semiconductor nanocrystal linked to a fluorescent moiety. Upon excitation, the fluorescent moiety can transfer energy to the semiconductor nanocrystal, or vice versa.

Fluorescent sensor based on two fluorescent moieties, one of which is a semiconductor nanocrystal, and methods of using and making

Fluorescent sensor based on two fluorescent moieties one of which is a semiconductor nanocrystal and methods of using and making

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Cambridge, MA, United States of America

Preston T Snee