摘要:
A composition of matter for a recording medium in atomic force data storage devices. The composition includes one or more poly(aryl ether ketone) copolymers, each of the one or more poly(aryl ether ketone) copolymers including (a) a first monomer including an aryl ether ketone and (b) a second monomer including an aryl ether ketone and a hydrogen bonding cross-linking moiety, the moiety capable of forming two or more hydrogen bonds at room temperature, each of the one or more poly(aryl ether ketone) copolymers having two terminal ends, each terminal end having a phenylethynyl moiety. The covalent and hydrogen bonding cross-linking of the poly(aryl ether ketone) oligomers may be tuned to match thermal and force parameters required in read-write-erase cycles.
摘要:
An apparatus comprising a substrate having a probe suspension formed thereon, a see-saw probe coupled to the probe suspension, the see-saw probe including first and second ends, with a tip projecting from a side of the first end, and an actuation electrode formed on the substrate, the actuation electrode positioned to exert a force upon the second end of the see-saw probe. A process comprising forming a probe suspension on a substrate, coupling a see-saw probe to the probe suspension, the see-saw probe including first and second ends, with a tip projecting from a side of the first end, and forming an actuation electrode on the substrate, the actuation electrode positioned to exert a force upon the second end of the see-saw probe.
摘要:
The invention relates generally to dispersing and fractionating single-wall carbon nanotubes, which can be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the nanotubes.
摘要:
A data storage medium is introduced. The data storage medium from which information is reproduced by scanning a surface of the medium with a tip positioned in contact therewith comprises a recording layer within which data values are determined by the topographical state at the data item location. The material of said recording layer comprises a component that is generating an etchant. The etchant removes the naturally occurring surface oxide layer of the tip which keeps the tip sharp and works against tip wear.
摘要:
To store information in a ferroelectric material, a sample probe is used to bring about mechanical action on individual domains and thereby to cause a reversal of polarization in the individual domains, with electrodes situated below the ferroelectric material being able to have a bias applied to them to stabilize the change/reversal of polarization. The reversal of polarization causes an alteration in the surface topography of the ferroelectric material, and this alteration can be used to read the information. The stored information is therefore obtained by ascertaining the surface topography of the ferroelectric material. The information is written and read using an AFM tip, with the tip being able to be operated in contact or tapping mode for the purpose of writing, and additionally in noncontact mode for the purpose of reading.
摘要:
A storage device including a storage medium for storing data in the form of topographic or magnetic marks. At least one probe is mounted on a common frame, the common frame and the storage medium designed for moving relative to each other for creating or detecting said marks. Each probe includes a tip facing the storage medium, a read sensing element, a write element and a capacitive platform, that forms a first electrode and is designed for a voltage potential applied to it independent from a control signal for said read sensing element and for said voltage potential applied to said capacitive platform being independent from a control signal for said write heating element. It further comprises a second electrode arranged in a fixed position relative to the storage medium forming a first capacitor together wherein said first electrode and a medium between the first and second electrode.
摘要:
This invention relates generally to cutting single-wall carbon nanotubes (SWNT). In one embodiment, the present invention provides for preparations of homogemeous populations of short carbon nanotube molecules by cutting and annealing (reclosing) the nanotube pieces followed by fractionation. The cutting and annealing processes may be carried out on a purified nanotube bucky paper, on felts prior to purification of nanotubes or on any material that contains single-wall nanotubes. In one embodiment, oxidative etching with concentrated nitric acid is employed to cut SWNTs into shorter lengths. The annealed nanotubes may be disbursed in an aqueous detergent solution or an organic solvent for the fractionation. Closed tubes can also be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the end caps.
摘要:
The invention relates generally to dispersing and fractionating single-wall carbon nanotubes, which can be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the nanotubes.
摘要:
This invention relates generally to forming arrays of single-wall carbon nanotubes (SWNT) and compositions thereof. In one embodiment, the present invention involves forming an array from more than one separately prepared molecular arrays or templates to prepare a composite structure. The multiple arrays can be the same or different with respect to the SWNT type or geometric arrangement in the array.
摘要:
This invention relates generally to the end derivatization of single-wall carbon nanotubes and to the introduction of endohedral groups to single-wall carbon nanotubes. In one embodiment, the single-wall carbon nanotubes are chemically derivatized at their ends (which may be made either open or closed with a hemi-fullerene dome). In another embodiment, the single-wall carbon nanotubes can be modified endohedrally, such as, for example, by including one or more metal atoms inside the structure or, alternatively, by loading the single-wall carbon nanotubes with one or more smaller molecules that do not bond to the structures.