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Hierarchical Colorful Structures by Three-Dimensional Printing of Inverse Opals

Hemant Kumar Raut, Hao Wang, Qifeng Ruan, Hongtao Wang, Javier G. Fernandez, and Joel K. W. Yang, Nano Letters 2021 21 (20), 8602-8608, DOI: 10.1021/acs.nanolett.1c02483

Abstract

Structural coloration is a recurring solution in biological systems to control visible light. In nature, basic structural coloration results from light interacting with a repetitive nanopattern, but more complex interactions and striking […]

Ultra-Deformable and Tissue-Adhesive Liquid Metal Antennas with High Wireless Powering Efficiency

Yamagishi, K., Zhou, W., Ching, T., Huang, S. Y., Hashimoto, M., Ultra-Deformable and Tissue-Adhesive Liquid Metal Antennas with High Wireless Powering Efficiency. Adv. Mater. 2021, 33, 2008062. https://doi.org/10.1002/adma.202008062
Abstract

Flexible and stretchable antennas are important for wireless communication using wearable and implantable devices to address mechanical mismatch at the tissue–device interface. Emerging technologies of liquid-metal-based stretchable electronics […]

Multiphysics modeling and experiments of grayscale photopolymerization with application to microlens fabrication

Emami, M.M., Jamshidian, M., Rosen, D.W., “Multiphysics modeling and experiments of grayscale photopolymerization with application to microlens fabrication,” Journal of Manufacturing Science and Engineering, Vol. 143, paper 091005, Sept. 2021.  DOI: 10.1115/1.4050549

Abstract

A phenomenological model of a single-shot grayscale photopolymerization process is developed and used within a virtual process planning framework for microlens fabrication. Along with […]

Bayesian inference-based decision of fatigue life model for metal additive manufacturing considering effects of build orientation and post-processing

Doh, J., Kim, S., Raju, N., Raghavan, N., Rosen, D.W., “Bayesian Inference-Based Decision of Fatigue Life Model for Metal Additive Manufacturing Considering Effects of Build Orientation and Post-Processing,” International Journal of Fatigue, Vol. 155, paper 106535, 2021.  https://doi.org/10.1016/j.ijfatigue.2021.106535
Highlights

Investigation of fatigue behavior for metal AM according to the manufacturing process.
Uncertainty quantification of fatigue life […]

Aerosol jet printing on paper substrate with conductive silver nano material

Chen, Yi-Dan, Nagarajan, Vijayasarathi, Rosen, David W., Yu, Wenwei, Huang, Shao Ying, Aerosol jet printing on paper substrate with conductive silver nano material, Journal of Manufacturing Processes Volume 58, October 2020, Pages 55-66, https://doi.org/10.1016/j.jmapro.2020.07.064 

The SEM images of the top view and cross-sectional view of the printed structures when different numbers of layers are finished (i.e., printed and sintered) in the proposed […]

Tuning Pressure Drop in Isoporous Membranes: Design with Fabrication Variability

Ong, S.K., Birgersson, E. and Low, H.Y. (2021), Tuning Pressure Drop in Isoporous Membranes: Design with Fabrication Variability. Adv. Theory Simul., 4: 2100088. https://doi.org/10.1002/adts.202100088 

Abstract

Isoporous membranes consist of well-defined micro and nanoscale pore architecture comprising uniform pore sizes with straight pore channels. In contrast to traditional random porous membranes with tortuous flow paths, isoporous membranes offer the […]

A Model-Based Reinforcement Learning and Correction Framework for Process Control of Robotic Wire Arc Additive Manufacturing

Abstract:
Robotic Wire Arc Additive Manufacturing (WAAM) utilizes a robot arm as a motion system to build 3D metallic objects by depositing weld beads one above the other in a layer by layer fashion. A key part of this approach is the process study and control of Multi-Layer Multi-Bead (MLMB) deposition, which is very sensitive to […]

Light Confinement in a 3D Space

The emerging services such as data center cloud interconnection services, ultra-bandwidth video services, and 5G mobile services stimulate the fast development of photonic integrated circuits (PIC), which can meet the increasing demand of communication systems for internet.

However, PICs today are largely perceived as planar structures, able to guide light in a single plane. This planarity […]

Structural Colour Printing

SUTD Visual Research featured Associate Professor Joel Yang’s research on Structural Colour Printing. Original link: SUTD Visual Research – Structural Colour Printing – SUTD

Let’s explore how we can produce high-resolution, fade-proof colours without using any colour pigments.

 

Joel Yang’s NanoLab (sutd.edu.sg)

A Soft Gripper with Retractable Nails for Advanced Grasping and Manipulation

Abstract:
This study describes the enhancement of a vacuum actuated soft gripper’s grasping capabilities using retractable finger nails and an active re-configurable palm. The finger nail mechanism is pneumatically actuated and enables the gripper to perform complex grasping and manipulation tasks with high repeatability. The retracted nails can exert normal grasping forces of up to 1.8N […]