Yadav Pradeep K, Lemoine Patrick
Nanotechnology and Integrated BioEngineering Center, University of Ulster, Jordanstown, Shore Road, Newtownabbey BT37 0QB, United Kingdom.
J Nanosci Nanotechnol. 2012 Jan;12(1):60-7. doi: 10.1166/jnn.2012.5731.
We present a dip pen nanolithography study of various hydrophilic ink/surface systems with application in the field of biosensors and novel nano-materials. The inking process was investigated by studying a number of inks, such as Deoxyribonucleic acid (DNA), Bovine serum albumin (BSA), Streptavidin, 16-mercaptohexadecanoic acid (MHA) and a 20 nm nanosphere (NS) polystyrene solution onto a range of substrates, namely glass, silicon, gold and tetrahedral amorphous carbon (taC). In the majority of cases, this resulted in patterns with sub-100 nm line widths and dot diameters. Importantly, contact angle measurements in the microl range showed a decrease of contact angle with drop volume, interpreted as a line tension effect. The significance of this to the nanoscale wetting behaviour is discussed. The effect of dwell time and writing speed indicates that the inking process is not solely defined by surface diffusion but also influenced by the ink dissolution rate from the tip.
我们展示了一项关于各种亲水性墨水/表面系统的蘸笔纳米光刻研究，其应用于生物传感器和新型纳米材料领域。通过研究多种墨水，如脱氧核糖核酸（DNA）、牛血清白蛋白（BSA）、链霉亲和素、16-巯基十六烷酸（MHA）以及一种20纳米纳米球（NS）聚苯乙烯溶液，在一系列基底上进行着墨过程的研究，这些基底包括玻璃、硅、金和四面体非晶碳（taC）。在大多数情况下，这产生了线宽和点直径小于100纳米的图案。重要的是，微升范围内的接触角测量显示接触角随液滴体积减小，这被解释为线张力效应。讨论了其对纳米级润湿行为的重要性。停留时间和书写速度的影响表明，着墨过程不仅由表面扩散定义，还受墨水从笔尖的溶解速率影响。
