Single-Step, Rapidly Reconfigurable Grayscale Nanoprinting by Light-Controlled Nanocapillary Effect

通过光控纳米毛细管效应进行单步、快速可重构灰度纳米打印

基本信息

批准号：
2129796
负责人：
Jaeyoun Kim
金额：
$ 52.5万
依托单位：
Iowa State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2129796&HistoricalAwards=false
关键词：
Single Step Rapidly Reconfigurable Grayscale

项目摘要

Meta-surfaces are material surfaces decorated with nanoscale features, which often acquire a variety of useful characteristics. Some of them generate vibrant colors without using dyes. Others can turn the moisture on them into tiny beads and clean themselves, a very useful feature for solar panels. Some others can even kill germs on them without using harmful chemicals. Meta-surfaces with such useful properties benefit society by promoting health, safety and sustainability. Recently, scientists discovered that spatially varying the height of the nanoscale surface features, or nanopixels, can make the meta-surfaces multi-functional. The key challenge is manufacturing the nanopixels with variable heights in a controllable manner. This award supports research to find a simple method to realize such variable height nanopixels. It is analogous to printing grayscale pixels. The grayscale nanoprinting method is based on the phenomenon of capillary action and its nanoscale control by light. To expedite the optimal design of the variable height meta-surfaces, the research approach integrates data science and machine learning. Accordingly, the research not only enriches nanomanufacturing but also advances fundamental nanotechnology and computational sciences through interdisciplinary endeavors. Plans for making science and technology more attractive to the general public and more accessible to women and underrepresented groups are included.This research explores light-controlled capillary effect for grayscale nanoprinting and nanotexturing. Conventional nanoprinting produces constant height nanopixels because the capillary rise of the photopolymer into the nanocavity cannot be stopped at an arbitrarily chosen height, nor can modulating the height as a function of position be possible. This research seeks to achieve both by exploiting the discovery that the capillary rise of certain polymers can be accurately controlled by light. The key enabling mechanism is the light-induced changes in the polymer’s liquid volume and viscosity which, in turn, govern the level of the polymer’s capillarity. Optical control is highly advantageous because light patterns can be rapidly updated by a spatial light modulator and easily shrunk down to the microscale by reduction optics, enabling rapidly reconfigurable, ultrahigh-resolution grayscale nanoprinting. This research establishes a novel nanomanufacturing paradigm and provides a useful tool for studying the physical process of polymeric capillarity. The collected data is leveraged to train a combination of advanced statistical and machine learning models to enable data-driven optimal design of meta-surfaces and their manufacturing. To combat the issues of data paucity and complex underlying physics, a synergistic combination of generalized models and deep learning is adopted to represent multi-physical performance targets, such as hydrophobicity and transparency.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

元曲面是装饰有纳米级特征的材料表面，通常会获得各种有用的特征。其中一些会产生鲜艳的色彩，而无需使用染料。其他人可以将它们的水分变成微小的珠子并清洁自己，这是太阳能电池板非常有用的功能。其他一些人甚至可以在不使用有害化学物质的情况下杀死细菌。具有如此有用特性的元表面通过促进健康，安全和可持续性使社会受益。最近，科学家发现，在空间上改变了纳米级表面特征或纳米质的高度，可以使元表面多功能。关键的挑战是以可控的方式生产具有可变高度的纳米质子。该奖项支持研究，以找到一种简单的方法来实现这种可变的高度纳米质子。它类似于打印灰度像素。灰度纳米构方法基于毛细作用的现象及其纳米级控制的现象。为了加快可变高度元曲面的最佳设计，研究方法整合了数据科学和机器学习。根据这项研究，该研究不仅丰富了纳米制造，而且还通过跨学科的努力提高了基本纳米技术和计算科学。包括使科学和技术对公众更具吸引力的计划，包括妇女和代表性不足的群体更容易获得。这项研究探讨了灰纳米纳米折线和纳米胶片的光控制毛细管效应。传统的纳米载构产生恒定的高度纳米质素，因为光聚合物向纳米腔的毛细血管升高不能在任意选择的高度下停止，也无法调节高度作为位置的函数。这项研究试图通过利用发现某些聚合物的毛细管升高可以通过光准确控制的发现来实现。关键的促成机制是聚合物液体体积和粘度的光引起的变化，进而控制了聚合物毛细血管的水平。光学控制具有高度优势，因为可以通过空间光调节器快速更新光图，并通过还原光学元件轻松地缩小到微观尺度上，从而可以快速重新配置，超高分辨率的灰度纳米构型。这项研究建立了一种新型的纳米制造范式，并为研究聚合物毛细血管的物理过程提供了有用的工具。利用收集的数据来训练先进的统计和机器学习模型的组合，以实现数据驱动的元曲面及其制造的最佳设计。为了打击数据匮乏和复杂的潜在物理问题，采用了广义模型和深度学习的协同组合来代表多物理性能目标，例如疏水性和透明度。该奖项反映了NSF的法定任务，并通过基金会的知识优点和广泛的影响来通过评估来诚实地通过评估来进行评估，以诚实地进行评估。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Optical Freeze-Framing and Analysis of Nanofluidic Behaviors in Elastomeric Nanocavities

弹性纳米腔中纳米流体行为的光学冻结框架和分析

DOI：
10.1109/mems51670.2022.9699535
发表时间：
2022
期刊：
Proceedings of 2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS
影响因子：
0
作者：
Ji, Myung Gi;Li, Qiang;Kim, Jaeyoun
通讯作者：
Kim, Jaeyoun

Height-modulation of diffraction gratings by light-controlled capillary force lithography for structural coloring

通过光控毛细管力光刻对衍射光栅进行高度调制以实现结构着色