Some variations provide an atomic instrument configured with an optically transparent and electrochemically cleanable window, comprising: a transparent first electrode; a second electrode with an atom reservoir for first metal ions; an ion conductor interposed between the first electrode and a second electrode, wherein the ion conductor is capable of transporting second metal ions, wherein the ion conductor is in contact with the first electrode and with the second electrode, and wherein the ion conductor is optically transparent; and a transparent window support in contact with the ion conductor, wherein the electrochemically cleanable window is optically transparent, wherein the transparent window support, the ion conductor, and the first electrode collectively form a transparent and electrochemically cleanable window. The disclosed technique removes adsorbed low-vapor-pressure metal thin films from the interior of windows before they become opaque, which extends system lifetime and reduces optical power requirements.

Some variations provide an atomic instrument configured with an optically transparent and electrochemically cleanable window, comprising: a transparent first electrode; a second electrode with an atom reservoir for first metal ions; an ion conductor interposed between the first electrode and a second electrode, wherein the ion conductor is capable of transporting second metal ions, wherein the ion conductor is in contact with the first electrode and with the second electrode, and wherein the ion conductor is optically transparent; and a transparent window support in contact with the ion conductor, wherein the electrochemically cleanable window is optically transparent, wherein the transparent window support, the ion conductor, and the first electrode collectively form a transparent and electrochemically cleanable window. The disclosed technique removes adsorbed low-vapor-pressure metal thin films from the interior of windows before they become opaque, which extends system lifetime and reduces optical power requirements.

A marker apparatus includes a housing, a current controller that is electrically connected to an electrode, a pad connected to the electrode for retaining an electrolytic fluid, and a removable cover. The removable cover retains an insulated stencil to an outer surface of the pad. The insulated stencil defines at least one permeable portion therein and a portion of the outer surface of the pad adjoins the at least one permeable portion. The at least one permeable portion can be formed as at least one opening defined through the insulated stencil, in which the portion of the outer surface of the pad extends into the at least one opening. The current controller provides an electric current from the electrode through the at least one permeable portion that is electrically connected to an object to be marker. The marker apparatus can include an on-board reservoir of electrolytic fluid and an actuator.

A marker apparatus includes a housing, a current controller that is electrically connected to an electrode, a pad connected to the electrode for retaining an electrolytic fluid, and a removable cover. The removable cover retains an insulated stencil to an outer surface of the pad. The insulated stencil defines at least one permeable portion therein and a portion of the outer surface of the pad adjoins the at least one permeable portion. The at least one permeable portion can be formed as at least one opening defined through the insulated stencil, in which the portion of the outer surface of the pad extends into the at least one opening. The current controller provides an electric current from the electrode through the at least one permeable portion that is electrically connected to an object to be marker. The marker apparatus can include an on-board reservoir of electrolytic fluid and an actuator.

A method for microengineering a gradient structure on a metal surface. A metal surface including at least first, second, and third metal surface regions is exposed to a metal-removing agent. A portion of surface metal atoms is removed by the metal-removing agent in each of the first, second, and third metal surface regions. Sequential metal removal processes expose only the second and third regions to the metal-removing agent, followed by exposing only the third region to the metal-removing agent. A gradient metal surface is formed having different properties in each of the first, second, and third metal surface regions. In a further aspect, quantitative surface-enhanced Raman spectroscopy may be performed using the treated metal surface. An amount of an analyte is determined based on its position in one of the first, second, or third metal surface regions.

A method for microengineering a gradient structure on a metal surface. A metal surface including at least first, second, and third metal surface regions is exposed to a metal-removing agent. A portion of surface metal atoms is removed by the metal-removing agent in each of the first, second, and third metal surface regions. Sequential metal removal processes expose only the second and third regions to the metal-removing agent, followed by exposing only the third region to the metal-removing agent. A gradient metal surface is formed having different properties in each of the first, second, and third metal surface regions. In a further aspect, quantitative surface-enhanced Raman spectroscopy may be performed using the treated metal surface. An amount of an analyte is determined based on its position in one of the first, second, or third metal surface regions.

Disclosed are a method for improving a surface quality of an alloy micro-area via a supersaturated film and use thereof. The method includes: adding nickel chloride to a sodium chloride-ethylene glycol electrolyte until the electrolyte is saturated, and conducting electrochemical machining.

Disclosed are a method for improving a surface quality of an alloy micro-area via a supersaturated film and use thereof. The method includes: adding nickel chloride to a sodium chloride-ethylene glycol electrolyte until the electrolyte is saturated, and conducting electrochemical machining.

Some variations provide an atomic instrument configured with an optically transparent and electrochemically cleanable window, comprising: a transparent first electrode; a second electrode with an atom reservoir for first metal ions; an ion conductor interposed between the first electrode and a second electrode, wherein the ion conductor is capable of transporting second metal ions, wherein the ion conductor is in contact with the first electrode and with the second electrode, and wherein the ion conductor is optically transparent; and a transparent window support in contact with the ion conductor, wherein the electrochemically cleanable window is optically transparent, wherein the transparent window support, the ion conductor, and the first electrode collectively form a transparent and electrochemically cleanable window. The disclosed technique removes adsorbed low-vapor-pressure metal thin films from the interior of windows before they become opaque, which extends system lifetime and reduces optical power requirements.

Some variations provide an atomic instrument configured with an optically transparent and electrochemically cleanable window, comprising: a transparent first electrode; a second electrode with an atom reservoir for first metal ions; an ion conductor interposed between the first electrode and a second electrode, wherein the ion conductor is capable of transporting second metal ions, wherein the ion conductor is in contact with the first electrode and with the second electrode, and wherein the ion conductor is optically transparent; and a transparent window support in contact with the ion conductor, wherein the electrochemically cleanable window is optically transparent, wherein the transparent window support, the ion conductor, and the first electrode collectively form a transparent and electrochemically cleanable window. The disclosed technique removes adsorbed low-vapor-pressure metal thin films from the interior of windows before they become opaque, which extends system lifetime and reduces optical power requirements.