title: Direct patterning of modified oligonucleotides on metals and insulators by dip-pen nanolithography.
abstract: The use of direct-write dip-pen nanolithography (DPN) to generate covalently anchored, nanoscale patterns of oligonucleotides on both metallic and insulating substrates is described. Modification of DNA with hexanethiol groups allowed patterning on gold, and oligonucleotides bearing 5'-terminal acrylamide groups could be patterned on derivatized silica. Feature sizes ranging from many micrometers to less than 100 nanometers were achieved, and the resulting patterns exhibited the sequence-specific binding properties of the DNA from which they were composed. The patterns can be used to direct the assembly of individual oligonucleotide-modified particles on a surface, and the deposition of multiple DNA sequences in a single array is demonstrated.
authors.affiliation: Department of Chemistry and Center for Nanofabrication and Molecular Self-Assembly, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
authors.forename: L M
authors.initials: LM
authors.lastname: Demers
authors.forename: D S
authors.initials: DS
authors.lastname: Ginger
authors.forename: S-J
authors.initials: SJ
authors.lastname: Park
authors.forename: Z
authors.initials: Z
authors.lastname: Li
authors.forename: S-W
authors.initials: SW
authors.lastname: Chung
authors.forename: C A
authors.initials: CA
authors.lastname: Mirkin
mesh_terms: D000327:Adsorption; D004247:DNA / Q000737:chemistry; D006046:Gold; D006813:Humidity; D018625:Microscopy, Atomic Force; D036103:Nanotechnology; D009693:Nucleic Acid Hybridization; D009838:Oligodeoxyribonucleotides / Q000737:chemistry; D020411:Oligonucleotide Array Sequence Analysis; D017646:Organosilicon Compounds; D010087:Oxides; D012821:Silanes; D017655:Silicon Compounds; D013438:Sulfhydryl Compounds; D013499:Surface Properties; D013696:Temperature
chemical_list: D009838:Oligodeoxyribonucleotides; D017646:Organosilicon Compounds; D010087:Oxides; D012821:Silanes; D017655:Silicon Compounds; D013438:Sulfhydryl Compounds; C116473:silicon monoxide; D006046:Gold; C102833:(3-mercaptopropyl)trimethoxysilane; D004247:DNA