摘要:
Nanotube films and articles and methods of making the same are disclosed. A conductive article includes an aggregate of nanotube segments in which the nanotube segments contact other nanotube segments to define a plurality of conductive pathways along the article. The nanotube segments may be single walled carbon nanotubes, or multi-walled carbon nanotubes. The various segments may have different lengths and may include segments having a length shorter than the length of the article. The articles so formed may be disposed on substrates, and may form an electrical network of nanotubes within the article itself. Conductive articles may be made on a substrate by forming a nanotube fabric on the substrate, and defining a pattern within the fabric in which the pattern corresponds to the conductive article. The nanotube fabric may be formed by growing the nanotube fabric on the substrate using a catalyst, for example, in which the catalyst is a gas phase catalyst, or in which the catalyst is a metallic gas phase catalyst. The nanotube fabric may be formed by depositing a solution of suspended nanotubes on the substrate. The deposited solution may be spun to create a spin-coating of the solution. The solution may be deposited by dipping the substrate into the solution. The nanotube fabric is formed by spraying an aerosol having nanotubes onto a surface of the substrate.
摘要:
An atomic force microscope (AFM) having a tip coated with hydrophobic compounds, which is performed as dip pen nanolithography (DPN), for transporting molecules from the atomic force microscope tip (AFM) to a gold substrate (AU) to write patterns on the gold substrate (AU).
摘要:
Die Erfindung betrifft ein Verfahren zum Aufbringen von Membranlipiden auf ein Substrat. Hierzu werden zunächst ein Substrat und ein Tintenvorrat mit einer Tinte aus den Membranlipiden bereitgestellt. Dann wird die Spitze eines Rasterkraftmikroskops in die Tinte aus den Membranlipiden eingetaucht, wodurch die Membranlipide auf die Spitze des Rasterkraftmikroskops aufgebracht werden. Anschließend wird die Spitze des Rasterkraftmikroskops mit der Oberfläche des Substrats in Kontakt gebracht und derart über Bereiche der Oberfläche bewegt, dass die Membranlipide in diesen Bereichen von der Spitze des Rasterkraftmikroskops auf die Oberfläche des Substrats wandern und sich dort in Form einer einzelnen Lipidschicht oder in Form einer oder mehrerer, übereinander aufgebrachter Lipid-Doppelschichten anordnen. Schließlich wird die Spitze von der Oberfläche des Substrats entfernt. Das erfindungsgemäße Verfahren eignet sich für die nicht-kovalente Strukturierung von Oberflächen insbesondere aus Silizium, Glas, Metall oder Polymer mit Membranlipiden als Tinte bei einer lateralen Auflösung unterhalb von 100 nm.
摘要:
A microfabricated probe array (32, 100) for nanolithography and process for designing and fabricating the probe array. The probe array (32, 100) consists of individual probes (35, 54, 72, 104) that can be moved independently using thermal bimetallic actuation or electrostatic actuation methods. The probe array (32, 100) can be used to produce traces of diffusively transferred chemicals (26) on a substrate (24) with sub-1 micrometer resolution, and can function as an arrayed scanning probe microscope for subsequent reading and variation of transferred patterns.
摘要:
Nanotube films and articles and methods of making the same are disclosed. A conductive article includes an aggregate of nanotube segments in which the nanotube segments contact other nanotube segments to define a plurality of conductive pathways along the article. The nanotube segments may be single walled carbon nanotubes, or multi-walled carbon nanotubes. The various segments may have different lengths and may include segments having a length shorter than the length of the article. The articles so formed may be disposed on substrates, and may form an electrical network of nanotubes within the article itself. Conductive articles may be made on a substrate by forming a nanotube fabric on the substrate, and defining a pattern within the fabric in which the pattern corresponds to the conductive article. The nanotube fabric may be formed by growing the nanotube fabric on the substrate using a catalyst, for example, in which the catalyst is a gas phase catalyst, or in which the catalyst is a metallic gas phase catalyst. The nanotube fabric may be formed by depositing a solution of suspended nanotubes on the substrate. The deposited solution may be spun to create a spin-coating of the solution. The solution may be deposited by dipping the substrate into the solution. The nanotube fabric is formed by spraying an aerosol having nanotubes onto a surface of the substrate.
摘要:
The invention relates to a method for detecting atomic displacement on the surface of a material in a system comprising a micro tip of a scanning tunnelling microscope (STM) and the said material, wherein the atomic displacement comprises extraction of atoms from the material surface or adsorption of atoms onto the material surface by applying a pulse voltage to the tip. The detection method comprises measuring the z-piezo voltage during and after application of the pulse voltage. The invention also relates to a method for the local supply of heteroatoms onto the surface of a material. Heteroatoms relative to the micro tip of a scanning tunnelling microscope (STM) and the said material are stored on the tip in a heteromolecular atmosphere in a manner described herein. A predetermined scanning voltage is then applied to the tip so as to cause electro-evaporation of the heteroatoms and their adsorption onto the material surface. The aforementioned methods of the invention are advantageously combined.
摘要:
This invention is concerned with the method and apparatus for forming a desired pattern of a material of either the conductive or non conductive type on a great variety of substrates. It is based on the use of a pen which essentially consists of a refractory tip wetted with the material in the molten state. The pen (10) first consists of a pointed tungsten tip (11) attached, e.g. by micro welding, to the top of a V-shaped tungsten heater (12), forming an assembly (14). The tip and the heater top portion are roughened at the vicinity of the welding point (13). In turn, the extremities of the V-shaped heater are welded to the pins (16, 16') of a 3-lead TO-5 package base (15). The pen (10) is incorporated in an apparatus adapted to the direct writing technique. To that end, the pen is attached to a supporting device capable of movements in the X, Y and Z directions, while the substrate is placed on an X-Y stage for adequate X, Y and Z relative movements therebetween. The two pins of the pen are connected to a power supply to resistively heat the heater. When the welding point of the tip/heater assembly reaches the melting point temperature of the material to be deposited, it is dipped in a crucible containing the said material in the molten state. The welding point nucleates a minute drop of the liquid material thus forming a reservoir. A thin film of the liquid material flows from the reservoir and wets the whole tip surface. Finally, the wetted tip is gently brought into contact with the substrate and deposition of the material can take place, as soon as the substrate is adequately moved, to produce the said desired pattern.
摘要:
Die Erfindung betrifft ein Verfahren zur gezielten, ortsselektiven und zeitlich stabilen Markierung von einzelnen atomaren Positionen oder von Gruppen solcher Positionen auf einer Festkörperoberfläche durch chemische Reaktion mit Fremdatomen bzw. Fremdmolekülen bzw. durch Chemisorption wobei jeweils die laterale atomare Ordnung der Festkörperoberfläche auch lokal erhalten bleibt, sowie die Verwendung dieses Verfahrens zur reversiblen Speicherung von Informationseinheiten.