Article
Electrochemistry
Francisco W. S. Lucas, Nathanael C. Ramos, Daniel K. Schwartz, J. Will Medlin, Adam Holewinski
Summary: Thiolate self-assembled monolayers (SAMs) are commonly used to modify surface properties, including catalytic activity. It is shown that irreversible changes to the metal surface, caused by the formation and removal of thiolate SAMs, can lead to significant changes in catalytic properties, regardless of specific interactions with reactants.
ELECTROCHIMICA ACTA
(2023)
Review
Physics, Multidisciplinary
Tianran Zhang, Dengping Lyu, Wei Xu, Yijiang Mu, Yufeng Wang
Summary: Introducing programmability concept facilitates the design of intelligent materials, with DNA-coated particles promising to program materials at the colloidal scale, despite facing challenges. Recent years have seen significant progress in this field, achieving various colloidal structures and dynamics previously inaccessible, beneficial for photonics and other applications. Tailoring DNA-coated colloids with sophisticated surface, shape, patches, and kinetics may allow programming of limitless structures, with future directions in the field also discussed.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Physical
Yurong Zhao, Xuzhi Hu, Limin Zhang, Dong Wang, Stephen M. King, Sarah E. Rogers, Jiqian Wang, Jian R. Lu, Hai Xu
Summary: Controlling the dimension of nanostructures self-assembled from short peptides remains a challenge, with peptide bolaamphiphiles forming nanotubes due to the interplay between side chain structure and hydrophobicity; changes in amino acid side chain structure can significantly impact nanostructure formation, with the introduction of hydroxyl groups alleviating steric hindrance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jie Xiao, Zhenqiang Shi, Muyu Cong, Dongdong Wang, Haijuan Qin, Qiongya Li, Wenqi Lu, Zhimou Guo, Xinmiao Liang, Guangyan Qing
Summary: This study reports the first photo-switchable, centimeter-scale, free-standing MOF monolayer film formed by self-assembly of poly(methyl methacrylate-co-acrylamidoazobenzene)-coated MOF nanoparticles at the water-air interface. The film has an extremely thin thickness (approximately 220 or 50 nm) and a high MOF loading (85 wt %), while exhibiting remarkable reversible photoswitching properties. Inspired by this, a light-gated ion nanochannel device is fabricated, which enables reversible '' OFF-ON '' changes of the ionic flux and has promising applications in the field of photoelectric conversion.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Baolin Zhao, Bastian Gothe, Arthur Groh, Thomas Schmaltz, Johannes Will, Hans-Georg Steinrueck, Tobias Unruh, Stefan Mecking, Marcus Halik
Summary: This study demonstrates the use of phosphonic acid oligomers in self-assembled monolayer field-effect transistors, showing increased mobility in devices by controlling the thiophene unit counts. X-ray techniques reveal the molecular-scale packing and order of SAMs with different chain lengths.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yiwen Wang, Wenlin Jiang, Shi-Chun Liu, Chieh-Ting Lin, Baobing Fan, Yanxun Li, Huanhuan Gao, Ming Liu, Francis R. Lin, Alex K. -Y. Jen
Summary: The operational stability of organic photovoltaics (OPVs) remains a major challenge for commercialization. By replacing the conventional hole-transporting layer with self-assembled monolayers of specific phosphonic acids, the lifetime and efficiency of OPV devices can be significantly improved. The improved performance is attributed to the stabilized vertical distribution of donor and acceptor components, reducing energetic disorder and non-radiative recombination losses. The application of these phosphonic acids in ternary devices demonstrates even higher efficiency and longer lifetime.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Julian M. Dlugosch, Henning Seim, Achyut Bora, Takuya Kamiyama, Itai Lieberman, Falk May, Florian Mueller-Plathe, Alexei Nefedov, Saurav Prasad, Sebastian Resch, Kai Saller, Christian Seim, Maximilian Speckbacher, Frank Voges, Marc Tornow, Peer Kirsch
Summary: This article presents a prototype of a ferroelectric tunnel junction (FTJ) based on a self-assembled monolayer (SAM) of small, functional molecules. The SAM is highly uniform and thin, and exhibits reversible conductance switching. Compared to inorganic material-based FTJs, this approach using SAMs of small organic molecules allows for a higher level of functional complexity while maintaining a robust and simple fabrication process. The technology is expected to find applications in information storage and processing.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Zhengkun Wang, Haiyang Sha, Ke Yang, Yong Zhu, Jie Zhang
Summary: In this study, the plasmonic response of self-assembled monolayer silver nanoparticles was comprehensively investigated using various computational and experimental techniques. The Fano resonance and SERS application were studied, and it was found that the higher-energy antibonding mode is not only from the antibonding dipole-dipole mode, but also from the antibonding quadrupole-quadrupole mode and hybridized magnetic mode. The effects of dimer gap and size were discussed in detail, and a two coupled oscillators model was used to illustrate the mechanism of the Fano resonance.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Jian Wang, Lang Liu, Guilong Yan, Yanchun Li, Yang Gao, Ye Tian, Lei Jiang
Summary: This study utilizes a new pH-responsive polymer self-assembly method to regulate ion transport inside artificial nanochannels. The designed system shows good switching properties and gating ability, with the ability to recover during repetitive experiments. This work provides a novel and robust strategy for the regulation of ion transport in synthetic nanochannels.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
T. A. Faraco, N. A. Yoshioka, R. M. Sabio, H. da S. Barud, I. O. Maciel, W. G. Quirino, B. Fragneaud, A. M. de Aguiar, S. J. L. Ribeiro, M. Cremona, C. Legnani
Summary: In this study, colloidal silica nanospheres with an average size of 400 nm were synthesized using the modified Stober method. An ordered close-packed silica nanosphere monolayer was successfully fabricated onto ITO-coated glass substrates through a three-step spin-coating method. The coated ITO/glass substrate showed good optical transmittance in the visible and near-infrared regions, indicating potential applications in optoelectronic devices to enhance efficiency in photovoltaic cells.
Article
Chemistry, Physical
Jianfeng Li, Wei Cao, Jinjin Li, Ming Ma
Summary: The study revealed that fluorination of perfluorocarbon SAM enhances superlubricity performance, achieving significantly lower friction coefficient and greater load-bearing capacity between graphite in water.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Byung Min Jeon, Chan Ho Kim, Heeyeop Chae, Byungkwon Lim, Sung Min Cho
Summary: The role of self-assembled monolayer obtained by vacuum deposition of 4-aminopyridine (4-AP) as a metal nucleation inducer and adhesion promoter was verified. It was found that 4-AP effectively changed the substrate surface properties and improved the nucleation density of silver (Ag), resulting in a more transparent and low-resistance Ag thin film.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Lijian Song, Youchen Zhang, Weimin Yang, Jing Tan, Lisheng Cheng
Summary: Recent studies have shown that introducing a self-assembled monolayer (SAM) can decrease thermal resistance between solid and fluid, while the molecular structure and bond strength of SAM significantly affect interfacial thermal resistance. Matching vibrational spectra facilitate thermal transport between SAM chains and fluids.
Article
Chemistry, Multidisciplinary
Jie Xiao, Muyu Cong, Minmin Li, Xin Zhang, Yahui Zhang, Xinjia Zhao, Wenqi Lu, Zhimou Guo, Xinmiao Liang, Guangyan Qing
Summary: This study reports the development of a heterogeneous subnanochannel membrane formed by coating a functionalized self-assembled metal-organic framework (MOF) monolayer (SAMM) film on a porous anodic aluminum oxide membrane. The membrane exhibits excellent capacity for anion-selective transport and has the potential for significant advancement in osmotic power.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shakil N. N. Afraj, Chun-Hsiao Kuan, Jian-Sing Lin, Jen-Shyang Ni, Arulmozhi Velusamy, Ming-Chou Chen, Eric Wei-Guang Diau
Summary: Four X-shaped quinoxaline-based organic dyes, PQx (1), TQx, (2), PQxD (3), and TQxD (4), are developed as p-type self-assemble monolayer (SAM) for tin perovskite solar cells (TPSC). The thermal, optical, and electrochemical properties of these SAMs are thoroughly investigated. Tin perovskite layers are successfully deposited on these SAM surfaces using a two-step approach, and the achieved device performance follows the order of TQxD (8.3%) > TQx (8.0%) > PQxD (7.1%) > PQx (6.1%). Among them, TQxD (4), with a thiophene pi-extended conjugation unit in the SAM structure, exhibits the highest hole extraction rates, greatest hole mobilities, and slowest charge recombination, leading to the best reported efficiency of 8.3% for SAM-based TPSC. Moreover, all devices except PQx show good enduring stability, retaining approximately 90% of their original values after 1600 hours of shelf storage.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
S. Harrer, S. C. Kim, C. Schieber, S. Kannam, N. Gunn, S. Moore, D. Scott, R. Bathgate, S. Skafidas, J. M. Wagner
Article
Computer Science, Hardware & Architecture
B. S. Mashford, A. Jimeno Yepes, I. Kiral-Kornek, J. Tang, S. Harrer
IBM JOURNAL OF RESEARCH AND DEVELOPMENT
(2017)
Article
Medicine, General & Internal
Isabell Kiral-Kornek, Subhrajit Roy, Ewan Nurse, Benjamin Mashford, Philippa Karoly, Thomas Carroll, Daniel Payne, Susmita Saha, Steven Baldassano, Terence O'Brien, David Grayden, Mark Cook, Dean Freestone, Stefan Harrer
Review
Pharmacology & Pharmacy
Stefan Harrer, Pratik Shah, Bhavna Antony, Jianying Hu
TRENDS IN PHARMACOLOGICAL SCIENCES
(2019)
Article
Medicine, General & Internal
Subhrajit Roy, Isabell Kiral, Mahtab Mirmomeni, Todd Mummert, Alan Braz, Jason Tsay, Jianbin Tang, Umar Asif, Thomas Schaffter, Mehmet Eren Ahsen, Toshiya Iwamori, Hiroki Yanagisawa, Hasan Poonawala, Piyush Madan, Yong Qin, Joseph Picone, Iyad Obeid, Bruno De Assis Marques, Stefan Maetschke, Rania Khalaf, Michal Rosen-Zvi, Gustavo Stolovitzky, Stefan Harrer
Summary: This study demonstrates the potential of using deep learning for patient-specific seizure detection, which can reduce the workload of human annotators while maintaining high accuracy in detection results.
Article
Clinical Neurology
Jianbin Tang, Rima El Atrache, Shuang Yu, Umar Asif, Michele Jackson, Subhrajit Roy, Mahtab Mirmomeni, Sarah Cantley, Theodore Sheehan, Sarah Schubach, Claire Ufongene, Solveig Vieluf, Christian Meisel, Stefan Harrer, Tobias Loddenkemper
Summary: Tracking seizures is crucial for epilepsy care, and using custom-developed machine learning algorithms with wearable sensors shows feasibility and better than chance seizure detection across various seizure types.
Article
Clinical Neurology
Shuang Yu, Rima El Atrache, Jianbin Tang, Michele Jackson, Adam Makarucha, Sarah Cantley, Theodore Sheehan, Solveig Vieluf, Bo Zhang, Jeffrey L. Rogers, Iven Mareels, Stefan Harrer, Tobias Loddenkemper
Summary: This study demonstrates the detection of various seizure types through wearable devices worn on the wrist or ankle, using custom-developed deep-learning models.
Proceedings Paper
Computer Science, Artificial Intelligence
Alessio Quercia, Thomas Frick, Fabian Emanuel Egli, Nicholas Pullen, Isabelle Dupanloup, Jianbin Tang, Umar Asif, Stefan Harrer, Thomas Brunschwiler
Summary: Epilepsy is a common neurological disorder characterized by recurrent seizures which can be predicted using EEG signals. A new method of labeling each seizure individually shows significant improvements compared to the standard approach, reducing noise in labels and enhancing classifier performance. This suggests that the duration of preictal states varies between seizures.
2021 IEEE INTERNATIONAL CONFERENCE ON DIGITAL HEALTH (ICDH 2021)
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
Deval Mehta, Umar Asif, Tian Hao, Erhan Bilal, Stefan von Cavallar, Stefan Harrer, Jeffrey Rogers
Summary: This paper introduces a novel deep learning enabled video analysis framework for assessing UPDRS in Parkinson's disease patients, showing better performance compared to trained clinicians. The framework evaluates sub-scores of BRADY and PIGD using standard sit-to-stand activities.
2021 IEEE/CVF CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION WORKSHOPS, CVPRW 2021
(2021)
Proceedings Paper
Engineering, Biomedical
S. Roy, U. Asif, J. Tang, S. Harrer
2020 IEEE SIGNAL PROCESSING IN MEDICINE AND BIOLOGY SYMPOSIUM
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Umar Asif, Jianbin Tang, Stefan Harrer
ECAI 2020: 24TH EUROPEAN CONFERENCE ON ARTIFICIAL INTELLIGENCE
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Umar Asif, Stefan Von Cavallar, Jianbin Tang, Stefan Harrer
ECAI 2020: 24TH EUROPEAN CONFERENCE ON ARTIFICIAL INTELLIGENCE
(2020)
Article
Medicine, General & Internal
Thomas Schaffter, Diana S. M. Buist, Christoph Lee, Yaroslav Nikulin, Dezso Ribli, Yuanfang Guan, William Lotter, Zequn Jie, Hao Du, Sijia Wang, Jiashi Feng, Mengling Feng, Hyo-Eun Kim, Francisco Albiol, Alberto Albiol, Stephen Morrell, Zbigniew Wojna, Mehmet Eren Ahsen, Umar Asif, Antonio Jimeno Yepes, Shivanthan Yohanandan, Simona Rabinovici-Cohen, Darvin Yi, Bruce Hoff, Thomas Yu, Elias Chaibub Neto, Daniel L. Rubin, Peter Lindholm, Laurie R. Margolies, Russell Bailey McBride, Joseph H. Rothstein, Weiva Sieh, Rami Ben-Ari, Stefan Harrer, Andrew Trister, Stephen Friend, Thea Norman, Berkman Sahiner, Fredrik Strand, Justin Guinney, Gustavo Stolovitzky
Proceedings Paper
Computer Science, Artificial Intelligence
Subhrajit Roy, Isabell Kiral-Kornek, Stefan Harrer
ARTIFICIAL INTELLIGENCE IN MEDICINE, AIME 2019
(2019)
Proceedings Paper
Biophysics
Isabell Kiral-Kornek, Dulini Mendis, Ewan S. Nurse, Benjamin S. Mashford, Dean R. Freestone, David B. Grayden, Stefan Harrer
2017 39TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC)
(2017)
