摘要:
The invention provides a lithographic method referred to as “dip pen” nanolithography (DPN). DPN utilizes a scanning probe microscope (SPM) tip (e.g., an atomic force microscope (AFM) tip) as a “pen,” a solid-state substrate (e.g., gold) as “paper,” and molecules with a chemical affinity for the solid-state substrate as “ink.” Capillary transport of molecules from the SPM tip to the solid substrate is used in DPN to directly write patterns consisting of a relatively small collection of molecules in submicrometer dimensions, making DPN useful in the fabrication of a variety of microscale and nanoscale devices. The invention also provides substrates patterned by DPN, including submicrometer combinatorial arrays, and kits, devices and software for performing DPN. The invention further provides a method of performing AFM imaging in air. The method comprises coating an AFM tip with a hydrophobic compound, the hydrophobic compound being selected so that AFM imaging performed using the coated AFM tip is improved compared to AFM imaging performed using an uncoated AFM tip. Finally, the invention provides AFM tips coated with the hydrophobic compounds.
摘要:
The disclosure relates to methods of beam pen lithography using a tip array having a plurality of transparent, elastomeric, reversibly-deformable tips coated with a blocking layer and apertures defined in the blocking layer to expose tip ends of the tips in the array. The tip array can be used to perform a photolithography process in which the tips are illuminated with a radiation that is channeled through the tips and out the apertures to expose a photosensitive substrate. Also disclosed are tip arrays formed of polymers and gels, apparatus including the tip arrays and radiation sources, and related apparatus for selectively masking tips in the tip array from radiation emitted from the radiation source.
摘要:
Disclosed are nanostructures having nanoprisms and agents, such as diagnostic and/or therapeutic agents. Nanoprisms with a surface plasmon resonance in the near-infrared convert irradiation, such as from a laser into heat selectively to allow the dissociation, such as dehybridization of oligonucleotide duplexes, of agents associated with the nanoprism surface. These nanostructures show morphological, chemical, and functional stability under hours of irradiation. Further disclosed are methods of selectively releasing agents from nanostructures after directed surface plasmon resonance mediated heating of the nanoprisms. Released agents, such as oligonucleotides, are unharmed by this process and can be repeatedly released and sequestered under spatiotemporal control.
摘要:
Coated colloidal materials, methods for making coated colloidal materials, and methods of using coated colloidal materials are disclosed. The method yields coated colloidal materials where the optical characteristics of the core is not adversely affected. The coated colloidal materials can be self-assembled into films, layers, or structures and used in the detection of analytes through detection assays.
摘要:
Disclosed herein are metal-organic frameworks of metals and boron rich ligands, such as carboranes and icosahedral boranes. Methods of synthesizing and using these materials in gas uptake are disclosed.
摘要:
A method of forming a target pattern using a redox activated surface is disclosed. The method includes patterning a redox agent on a template layer formed on a substrate, the template layer having a first oxidation state, wherein upon contact with the redox agent, the contacted portion of the template layer changes to a second oxidation state different than the first oxidation state, and a template pattern is formed from the portion of the template layer having either the first oxidation state or the second oxidation state, and exposing the substrate having the template pattern to a target material, wherein the target material selectively binds to the template pattern to form a target pattern.
摘要:
Nanoprisms containing silver and gold are disclosed. The nanoprisms exhibit the properties of pure silver nanoprisms, but are less susceptible to silver modification or reaction by a surrounding environment than pure silver nanoprisms due to the presence of the gold. The gold surface of the nanoprisms can be further modified, using known gold-modification techniques.
摘要:
A dual tip probe for scanning probe epitaxy is disclosed. The dual tip probe includes first and second tips disposed on a cantilever arm. The first and second tips can be a reader tip and a synthesis tip, respectively. The dual tip probe further includes a rib disposed on the cantilever arm between the first and second tips. The dual tip probe can also include a strain gauge disposed along the length of the cantilever arm.