Carbon quantum dot-nanowire array-based cardiomyocyte signal molecule sensor and preparation method thereof

Abstract

The invention belongs to the technical field of photoelectrochemical sensors, and particularly relates to a carbon quantum dot-nanowire array-based cardiomyocyte signal molecule sensor based on sunlight drive and a preparation method thereof. The preparation method comprises the following steps: under a hydrothermal system, growing a titanium dioxide nanowire array on a conductive glass substrate; obtaining silane-functionalized nitrogen-doped carbon dots (N-CDots) at one step in situ through using a microwave method; then placing titanium dioxide nanowires processed by concentrated sulfuric acid into an N-CDot ethanol solution, adding stronger ammonia water, standing and reacting, and defining as N-CDot-TiO2. The photoelectric current of the N-CDot-TiO2 is improved by almost two times compared with that of pure TiO2, and the prepared photoelectric current on-off sensor can be used for dynamically detecting the content of H2S star molecules of cardiomyocytes in real time in situ. The carbon quantum dot-nanowire array-based cardiomyocyte signal molecule sensor is smart in design and wide in the source of raw materials, the preparation method is simple, environment-friendly, low in price, fast to response, wide in linear range, high in selectivity, and beneficial to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemical sensors, and in particular relates to a solar-driven carbon quantum dot-nano wire array signal molecular sensor applied to cardiomyocytes and a preparation method thereof. Background technique [0002] In recent years, the energy crisis and environmental pollution problems that mankind is currently facing have become increasingly prominent. The development of society requires the development of efficient, pollution-free clean energy. The energy that supports human survival and development is changing from oil, coal, etc. Consumption energy is shifting to clean and renewable energy. Photoelectrochemical technology has become an ideal environmental pollution control technology and clean energy production technology because of its unique properties such as deep reaction at room temperature and direct use of solar energy as a light source to drive the reaction. Among them, semiconductor ...

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Problems solved by technology

However, most of them still use common fluorescent dyes as signal reporting groups, and the excitation and emission wavelengths are in the ultraviolet-visible region. There are many disadvantages when used in cell and living imaging, such as severe tissue damage and poor penetration ability.

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