BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT UID:65635e2cf6b9ccaabeb5bc8d4fb0b76d CATEGORIES:Colloquium CREATED:20200117T190143 SUMMARY:Professor Steven Stevenson, Purdue University Fort Wayne LOCATION:CCB Auditorium (1303) DESCRIPTION:Chemical Isolation of Fullertubes: Are They Nanotubes or Fullerenes?\nFull ertubes are a tubular form of carbon that are rarely studied due to low yie lds and separation hurdles. The fullertube structure represents a merging of a rolled graphene moiety (single wall nanotube belt region) and two full erene-based endcaps, whose axis of symmetry can be hexagonal or pentagonal. The fullerene and nanotube substructures in fullertubes offer scientists a unique molecular scaffold for building new 2D and 3D molecular, supramole cular, and polymeric architectures. We are currently looking to entrap ato ms inside the fullertube cavity. For the cage surface, derivatization of t he carbon structure would result in new materials for fundamental science a nd applications. It should be possible to leverage the existing literatur e on nanotubes and fullerenes in future fullertube research. Other advanta ges of fullertubes include (1) reproducible structures, (2) fixed aspect ra tios, (3) defined molecular weights, and (4) solubility in organic solvents . In this talk, we describe a new chemical-based purification method to is olate fullertubes in sufficient quantities for collaborative experiments. This scalable method allows us to enrich fullertube concentrations by facto rs of 100-1000 times. Further, this approach allows us to isolate “giant” fullerene structures that are previously unreported. A key question is as follows: Are these newly discovered carbon species spheres or tubes? We w ill discuss our most recent experimental findings.\n~ Coffee/tea will be se rved prior to lecture~\n X-ALT-DESC;FMTTYPE=text/html:
Chemical Isolation of Fuller tubes: Are They Nanotubes or Fullerenes?
Fullertubes are a tubular form of carbon that are rarely studied due to low yields and separation hurdles. The fullertube structure repre sents a merging of a rolled graphene moiety (single wall nanotube belt regi on) and two fullerene-based endcaps, whose axis of symmetry can be hexagona l or pentagonal. The fullerene and nanotube substructures in fullertu bes offer scientists a unique molecular scaffold for building new 2D and 3D molecular, supramolecular, and polymeric architectures. We are curre ntly looking to entrap atoms inside the fullertube cavity. For the ca ge surface, derivatization of the carbon structure would result in new mate rials for fundamental science and applications. It should be po ssible to leverage the existing literature on nanotubes and fullerenes in f uture fullertube research. Other advantages of fullertubes include (1 ) reproducible structures, (2) fixed aspect ratios, (3) defined molecular w eights, and (4) solubility in organic solvents. In this talk, we desc ribe a new chemical-based purification method to isolate fullertubes in suf ficient quantities for collaborative experiments. This scalable metho d allows us to enrich fullertube concentrations by factors of 100-1000 time s. Further, this approach allows us to isolate “giant” fullerene stru ctures that are previously unreported. A key question is as follows:& nbsp; Are these newly discovered carbon species spheres or tubes? We will discuss our most recent experimental findings.
~ Coffee/tea will be served prior to lecture~
X-EXTRAINFO:Hosted by Professor Jianyuan Zhang DTSTAMP:20240329T092127 DTSTART:20200211T160000 DTEND:20200211T170000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR