7 results about "Negative charge" patented technology

A making method of a composite type biological chip based on a photonic crystal comprises four steps which are preparation of hard substrates, preparation of photonic crystal thin membranes, connection of membranous substrates and surface treatment of the substrates. (1) the preparation of hard substrates: common hard substrates are cleaned by soapy water, washed by de-ionized water and dried, and amino-group or hydroxyl is decorated on the surfaces of the substrates; (2) the preparation of photonic crystal: the nano-microspheres such as specific monodisperse silicon dioxide or polystyrene and the like, which are different in size according to the positions of testing signals, are assembled on the surfaces of the treated substrates to form the photonic crystal thin membrane with the thickness of 20 to 30 microns (3) the connection of membranous substrates: the surface of the photonic crystal thin membrane is laid with a layer of the membranous substrate and the connection is fixed by utilizing the chemisorption or the mutual function between positive and negative charges; (4) the surface treatment of the substrates: by using the methods such chemisorption and the like, chemical groups which can be fixedly connected with biomolecules to be tested are decorated on the membranous layer parts of the surfaces of the composite substrates which are formed in the step (3).

An electrochemical planarization apparatus for planarizing a metallized surface on a workpiece includes a polishing pad and a platen. The platen is formed of conductive material, is disposed proximate to the polishing pad and is configured to have a negative charge during at least a portion of a planarization process. At least one electrical conductor is positioned within the platen. The electrical conductor has a first end connected to a power source. A workpiece carrier is configured to carry a workpiece and press the workpiece against the polishing pad. The power source applies a positive charge to the workpiece via the electrical conductor so that an electric potential difference between the metallized surface of the workpiece and the platen is created to remove at least a portion of the metallized surface from the workpiece.

The double-carbon accumulator consists of at least one pair of carbon electrodes and electrolyte, and features that electrolyte is set between two carbon electrodes of each pair. Under the action of the electric field and ionization, the positive charges and the negative charges move to the surface of the carbon electrodes separately to form charge layers and realize charging. The present invention has long service life, no environmental pollution, short charge period, low cost, no polarity and great discharge current.

The invention discloses an anti-dust and anti-inflamatory cosmetic composition containing natural plant extracts, specifically, a cosmetic ingredient that inhibits the attachment of fine dust containing pollutants such as soot from a factory, automobile exhaust and the like to the skin by selecting one or more natural plant extracts as an active ingredient from the hinoki wood leaf extract, Ophiopogon japonicus extract and Artemisia annua extract which provide the negative charge and that can also inhibit the inflammatory reaction caused by the attachment. The natural plant extracts in the cosmetic ingredient of the invention have the same negative charge as the fine dust and an electrostatic reaction is formed between the negative charges, so that the fine dust can be prevented from attaching to the skin, the effect of blocking skin irritation caused by the attachment of fine dust can be also achieved, the occurrence of skin problems can be prevented, and the fine dust is prevented from coming into contact with the skin to cause an inflammatory reaction, thereby keeping the skin clean.

Embodiments of the invention relate to the technical field of electronic products, and disclose a sound pickup device and electronic equipment. In the embodiments of the invention, the sound pickup device comprises: a display module, an adhesive coating and a back plate, wherein the display module comprises a glass cover plate, a display screen and a bracket; the adhesive coating comprises at least a charge-retaining coating stored with a negative charge; the glass cover plate is disposed at the top of the bracket and covers the opening of the accommodating space of the bracket; the adhesive coating is applied to a preset area of the glass cover plate and located in the accommodating space; the back plate is disposed on the display and fixed at the bottom of the bracket, and a predetermined spacing is provided between the charge-retaining layer and the charge-retaining coating corresponding to the back plate; the adhesive coating and the back plate are respectively connected to the processing module of the electronic equipment. The embodiments of the invention satisfy the requirement of remote sound pickup, so that the housing of the electronic equipment does not need for sound conduction, which improves the appearance of the electronic equipment and enhances the dust resistance of the electronic equipment.

The invention discloses an electron-emitting source. The electron-emitting source is provided with a negative electrode (7), a grid electrode (1), a positive electrode (2) and a reflecting plate (6);the negative electrode (7) is arranged between the reflecting plate (6) and the positive electrode (2). The electron-emitting source is used for an ion thruster, emits electrons, neutralizes positiveions, and emits negative charges on the surface of an aerospace craft to neutralize the positive ions, so that the aerospace craft is in the positive and negative charge balance state.