| http://www.w3.org/ns/prov#value | - A method is described for producing such a needle probe tip wherein a substrate is positioned in an evacuated environment; a volatile organic compound is introduced into the environment and an energy beam, for example a laser beam, an electron beam and an x-ray beam from a synchrotron and the like, is directed at the substrate's surface, which energy beam is maintained stably focussed thereon for
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