کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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870399 | 909861 | 2006 | 6 صفحه PDF | دانلود رایگان |

SU-8 is an epoxy-based photosensitive resist, which is currently used for a large variety of MEMS and lab-on-a-chip applications. Here, we demonstrate a one-step process to functionalise SU-8 with DNA probes. The immobilisation procedure relies on direct coupling of DNA to SU-8 and resulted in surfaces with functional capture probe densities of approximately 10 fmol/mm2 as determined by hybridisation assays with fluorescent labelled target molecules. A comparable density of functional capture probes was measured on commercial aldehyde coated glass. DNA probes did not decrease in hybridisation performance after 10 min incubation in water at 98 °C prior to hybridisation, indicating a covalent bond between DNA and SU-8. Finally, DNA microarrays of high quality were obtained on SU-8 by contact printing of probe solution directly on SU-8 demonstrating a simple method for the implementation of microarrays in microsystems.
Journal: Biosensors and Bioelectronics - Volume 21, Issue 7, 15 January 2006, Pages 1327–1332