Nanopatterning of a Stimuli-Responsive Fluorescent Supramolecular Polymer by Thermal Scanning Probe Lithography.
Nanopatterning of a Stimuli-Responsive Fluorescent Supramolecular Polymer by Thermal Scanning Probe Lithography.
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DOI：
10.1021/acsami.7b13672
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发表时间：
2017-11-29
影响因子：
9.5
通讯作者：
Brugger J
中科院分区：
文献类型：
--
作者：
Zimmermann ST;Balkenende DWR;Lavrenova A;Weder C;Brugger J
纳米尺寸荧光特征的小型化对于伪造安全特征、数据存储和传感器具有持续的意义。在工程上的刺激响应性超分子聚合物材料的最新进展，响应暴露于热或机械力，通过改变它们的荧光特性打开了新的机会，作为功能性光刻胶。在这里，我们展示了图案化的热致变色超分子材料的热扫描探针光刻（t-SPL），一种新兴的纳米纤维技术，它允许超快压痕与加热的探针，从而在荧光和地形纳米功能。t-SPL压痕揭示了材料软化发生的温度和压痕力之间的线性关系，范围从200到500 nN。从4 μs到1 ms，软化温度随加热时间的增加而降低，呈现时间-温度叠加的规律。我们的研究结果证实，荧光对比度，可感知为从红色到绿色的转变，是通过动力学捕获的解离状态，由于超快速冷却时，探针被删除。我们使用t-SPL创建高度定制的荧光图案，尺寸高达40 × 40 μm2，空间分辨率为86 nm，并改变间距大小以修改荧光显微镜观察时的荧光强度。作为一个应用程序，多方面的安全功能与纳米分辨率进行了探讨。
The miniaturization of nanometer-sized multicolor fluorescent features is of continuous significance for counterfeit security features, data storage, and sensors. Recent advances in engineering of stimuli-responsive supramolecular polymeric materials that respond upon exposure to heat or mechanical force by changing their fluorescence characteristics open new opportunities as functional lithographic resists. Here, we demonstrate the patterning of a thermochromic supramolecular material by thermal scanning probe lithography (t-SPL), an emerging nanofabrication technique, which allows for ultrafast indentation with a heated probe, resulting in both fluorescent and topographic nanofeatures. t-SPL indentation reveals a linear relationship between the temperature at which material softening occurs and the indentation force in the range from 200 to 500 nN. The softening temperature decreases as the heating time increases from 4 μs to 1 ms, following time–temperature superposition behavior. Our results herein confirm that the fluorescence contrast, perceivable as a shift from red to green, was obtained by kinetic trapping of the dissociated state due to ultrarapid cooling when the probe is removed. We use t-SPL to create highly customized fluorescence patterns up to 40 × 40 μm2 in size with a spatial resolution of 86 nm and change the pitch size to modify the fluorescence intensity when observed by fluorescence microscopy. As an application, multifaceted security features with nanometer resolution are explored.
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影响因子：
4.3
作者：
Sagara, Yoshimitsu;Lavrenova, Anna;Weder, Christoph
通讯作者：
Weder, Christoph
影响因子：
5.5
作者：
Balkenende, Diederik W. R.;Olson, Rebecca A.;de Espinosa, Lucas Montero
通讯作者：
de Espinosa, Lucas Montero
影响因子：
1.4
作者：
Wolf, Heiko;Rawlings, Colin;Knoll, Armin W.
通讯作者：
Knoll, Armin W.
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4
作者：
Xia, QF;Keimel, C;Chou, SY
通讯作者：
Chou, SY
影响因子：
29.4
作者：
Lott, Joseph;Ryan, Christopher;Weder, Christoph
通讯作者：
Weder, Christoph