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1. Manufacturing and metrology of 3D holographic structure nanopatterns in roll-to-roll fabrication

   https://doi.org/10.1117/12.3010004  

   Groh, Barbara; Lee, Kwon-Sang; Aguirre, Luis; Cullinan, Michael; Chang, Chih-Hao (April 2024, SPIE)

   Liddle, J Alexander; Ruiz, Ricardo (Ed.)
2. Spatially Dependent Transfer Functions for Web Lateral Dynamics in Roll-to-Roll Manufacturing

   https://doi.org/10.1115/1.4040216  

   Cobos Torres, Edison O.; Pagilla, Prabhakar R. (November 2018, Journal of Dynamic Systems, Measurement, and Control)
3. Towards Quasi-real-time, Tip-based Process Control in Roll-to-Roll Nanomanufacturing

   Connolly, Liam; Groh, Barbara; Cullinan, Michael (May 2023, The 66th International Conference on Electron, Ion and Photon Beam Technology and Nanofabrication​)
4. The Nip Mechanics of Nano-Impression Lithography in Roll-to-Roll Process Machines

   Ren, Yao; Good, James K. (June 2017, Proceedings of the Fourteenth International Conference on Web Handling)

   Nano-Impression Lithography (NIL) has been demonstrated to produce nano features on webs that have value to society. Such demonstrations have largely been the result of NIL processes that involve the discrete stamping of a mold with nano-impressions into a thermoplastic web or a web coated with resin that is cured during the imprint process. To scale NIL to large area products which can be produced economically requires the imprinting to occur on roll-to-roll (R2R) process machines. Nip mechanics is a topic which has been explored in relation to drive nips and winding nips in R2R machines. Nip rollers will be needed to imprint webs at production speeds to ensure mold filling on an imprint roller. The objective of this paper is to demonstrate while the nip roller is required that it can also induce imperfections in the imprinted nano-features. Successful imprinting will require nip loads sufficient to fill the imprint mold and then addressing the nip mechanics which can induce shear and slip that could destroy the nano-features. The objective is to demonstrate through the study of nip mechanics that this shear and slip can be inhibited through the selection of nip materials and tension control of the web entering and exiting the nipped imprint roller. 

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5. Roll‐to‐Roll Dry Transfer of Large‐Scale Graphene

   https://doi.org/10.1002/adma.202106615  

   Hong, Nan; Kireev, Dmitry; Zhao, Qishen; Chen, Dongmei; Akinwande, Deji; Li, Wei (November 2021, Advanced Materials)

   Abstract A major challenge for graphene applications is the lack of mass production technology for large‐scale and high‐quality graphene growth and transfer. Here, a roll‐to‐roll (R2R) dry transfer process for large‐scale graphene grown by chemical vapor deposition is reported. The process is fast, controllable, and environmentally benign. It avoids chemical contamination and allows the reuse of graphene growth substrates. By controlling tension and speed of the R2R dry transfer process, the electrical sheet resistance is achieved as 9.5 kΩ sq⁻¹, the lowest ever reported among R2R dry transferred graphene samples. The R2R dry transferred samples are used to fabricate graphene‐based field‐effect transistors (GFETs) on polymer. It is demonstrated that these flexible GFETs feature a near‐zero doping level and a gate leakage current one to two orders of magnitude lower than those fabricated using wet‐chemical etched graphene samples. The scalability and uniformity of the R2R dry transferred graphene is further demonstrated by successfully transferring a 3 × 3 in²sample and measuring its field‐effect mobility with 36 millimeter‐scaled GFETs evenly spaced on the sample. The field‐effect mobility of the R2R dry transferred graphene is determined to be 205 ± 36 cm² V⁻¹. 

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