1
|
Saluja S, Croy I, Gruhl A, Croy A, Kanbaty M, Hellmann A, Stevenson RJ. Facial disgust in response to touches, smells, and tastes. Emotion 2024; 24:2-14. [PMID: 37307334 DOI: 10.1037/emo0001257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Disgust serves to defend the body from the entry of toxins and disease. Central to this function is a strong relationship with the proximate senses of smell, taste, and touch. Theory suggests that distinct and reflexive facial movements should be evoked by gustatory and olfactory disgusts, serving to impede bodily entry. While this hypothesis has received some support from facial recognition studies, whether smell and taste disgusts actually produce distinct facial responses, is unknown. Moreover, there has been no assessment of the facial response evoked by contact with disgusting objects. To address these issues, this study compared facial responses to touch, smell, and taste disgusts. Sixty-four participants were asked to touch, smell, and taste disgust-evoking and neutral control stimuli, and rate them on disgust, on two occasions-first, while they were video recorded and second, with facial electromyography (EMG) applied (measuring levator labii and corrugator supercilii activity). Videos were coded for facial expressions by humans and for facial action units (FAUs) by machines. Self-report data confirmed the disgust stimuli as highly disgusting. Comparison of the overall pattern of FAUs evoked by touch, smell, and taste disgusts, indicated two distinct facial disgusts for the proximate senses-a chemosensory and a tactile-disgust face. The nose wrinkle and upper lip raise were central to all facial disgusts, indicating their centrality to the disgust face. Several facial disgusts appear to exist, each with different functional goals. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
Collapse
Affiliation(s)
| | - Ilona Croy
- Department of Psychotherapy and Psychosomatic Medicine, Technische Universitat Dresden
| | - Anne Gruhl
- Department of Psychotherapy and Psychosomatic Medicine, Technische Universitat Dresden
| | - Alexander Croy
- Institute of Physical Chemistry, Friedrich Schiller University Jena
| | - Majid Kanbaty
- Department of Accounting and Corporate Governance, Macquarie Business School, Macquarie University
| | - Andreas Hellmann
- Department of Accounting and Corporate Governance, Macquarie Business School, Macquarie University
| | | |
Collapse
|
2
|
Wang C, Cusin L, Ma C, Unsal E, Wang H, Consolaro VG, Montes-García V, Han B, Vitale S, Dianat A, Croy A, Zhang H, Gutierrez R, Cuniberti G, Liu Z, Chi L, Ciesielski A, Samorì P. Enhancing the Carrier Transport in Monolayer MoS 2 through Interlayer Coupling with 2D Covalent Organic Frameworks. Adv Mater 2024; 36:e2305882. [PMID: 37690084 DOI: 10.1002/adma.202305882] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/23/2023] [Indexed: 09/12/2023]
Abstract
The coupling of different 2D materials (2DMs) to form van der Waals heterostructures (vdWHs) is a powerful strategy for adjusting the electronic properties of 2D semiconductors, for applications in opto-electronics and quantum computing. 2D molybdenum disulfide (MoS2 ) represents an archetypical semiconducting, monolayer thick versatile platform for the generation of hybrid vdWH with tunable charge transport characteristics through its interfacing with molecules and assemblies thereof. However, the physisorption of (macro)molecules on 2D MoS2 yields hybrids possessing a limited thermal stability, thereby jeopardizing their technological applications. Herein, the rational design and optimized synthesis of 2D covalent organic frameworks (2D-COFs) for the generation of MoS2 /2D-COF vdWHs exhibiting strong interlayer coupling effects are reported. The high crystallinity of the 2D-COF films makes it possible to engineer an ultrastable periodic doping effect on MoS2 , boosting devices' field-effect mobility at room temperature. Such a performance increase can be attributed to the synergistic effect of the efficient interfacial electron transfer process and the pronounced suppression of MoS2 's lattice vibration. This proof-of-concept work validates an unprecedented approach for the efficient modulation of the electronic properties of 2D transition metal dichalcogenides toward high-performance (opto)electronics for CMOS digital circuits.
Collapse
Affiliation(s)
- Can Wang
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, P. R. China
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Luca Cusin
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Chun Ma
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Elif Unsal
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062, Dresden, Germany
| | - Hanlin Wang
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | | | - Verónica Montes-García
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Bin Han
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Stefania Vitale
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062, Dresden, Germany
| | - Alexander Croy
- Institute of Physical Chemistry, Friedrich Schiller University Jena, 07737, Jena, Germany
| | - Haiming Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon Based Functional Materials & Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Rafael Gutierrez
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062, Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062, Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062, Dresden, Germany
| | - Zhaoyang Liu
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, P. R. China
| | - Lifeng Chi
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon Based Functional Materials & Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Artur Ciesielski
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| | - Paolo Samorì
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, Strasbourg, 67000, France
| |
Collapse
|
3
|
Prasoon A, Yu X, Hambsch M, Bodesheim D, Liu K, Zacarias A, Nguyen NN, Seki T, Dianat A, Croy A, Cuniberti G, Fontaine P, Nagata Y, Mannsfeld SCB, Dong R, Bonn M, Feng X. Site-selective chemical reactions by on-water surface sequential assembly. Nat Commun 2023; 14:8313. [PMID: 38097633 PMCID: PMC10721922 DOI: 10.1038/s41467-023-44129-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/01/2023] [Indexed: 12/17/2023] Open
Abstract
Controlling site-selectivity and reactivity in chemical reactions continues to be a key challenge in modern synthetic chemistry. Here, we demonstrate the discovery of site-selective chemical reactions on the water surface via a sequential assembly approach. A negatively charged surfactant monolayer on the water surface guides the electrostatically driven, epitaxial, and aligned assembly of reagent amino-substituted porphyrin molecules, resulting in a well-defined J-aggregated structure. This constrained geometry of the porphyrin molecules prompts the subsequent directional alignment of the perylenetetracarboxylic dianhydride reagent, enabling the selective formation of a one-sided imide bond between porphyrin and reagent. Surface-specific in-situ spectroscopies reveal the underlying mechanism of the dynamic interface that promotes multilayer growth of the site-selective imide product. The site-selective reaction on the water surface is further demonstrated by three reversible and irreversible chemical reactions, such as imide-, imine-, and 1, 3-diazole (imidazole)- bonds involving porphyrin molecules. This unique sequential assembly approach enables site-selective chemical reactions that can bring on-water surface synthesis to the forefront of modern organic chemistry.
Collapse
Affiliation(s)
- Anupam Prasoon
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
- Max Planck Institute for Microstructure Physics, Halle (Saale), D-06120, Germany
| | - Xiaoqing Yu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Mike Hambsch
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062, Dresden, Germany
| | - David Bodesheim
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062, Dresden, Germany
| | - Kejun Liu
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Angelica Zacarias
- Max Planck Institute for Microstructure Physics, Halle (Saale), D-06120, Germany
| | - Nguyen Ngan Nguyen
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Takakazu Seki
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Aerzoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062, Dresden, Germany
| | - Alexander Croy
- Institute of Physical Chemistry, Friedrich Schiller University Jena, 07737, Jena, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062, Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), Technische Universität Dresden, 01062, Dresden, Germany
| | - Philippe Fontaine
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190, Saint-Aubin, France
| | - Yuki Nagata
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Stefan C B Mannsfeld
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062, Dresden, Germany.
| | - Renhao Dong
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
- Max Planck Institute for Microstructure Physics, Halle (Saale), D-06120, Germany.
| |
Collapse
|
4
|
Schulze WT, Schwalbe S, Trepte K, Croy A, Kortus J, Gräfe S. Bond formation insights into the Diels-Alder reaction: A bond perception and self-interaction perspective. J Chem Phys 2023; 158:2884948. [PMID: 37093147 DOI: 10.1063/5.0145555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023] Open
Abstract
The behavior of electrons during bond formation and breaking cannot commonly be accessed from experiments. Thus, bond perception is often based on chemical intuition or rule-based algorithms. Utilizing computational chemistry methods, we present intrinsic bond descriptors for the Diels-Alder reaction, allowing for an automatic bond perception. We show that these bond descriptors are available from localized orbitals and self-interaction correction calculations, e.g., from Fermi-orbital descriptors. The proposed descriptors allow a sparse, simple, and educational inspection of the Diels-Alder reaction from an electronic perspective. We demonstrate that bond descriptors deliver a simple visual representation of the concerted bond formation and bond breaking, which agrees with Lewis' theory of bonding.
Collapse
Affiliation(s)
- Wanja Timm Schulze
- Institute for Physical Chemistry, Friedrich Schiller University, Jena 07743, Germany
| | - Sebastian Schwalbe
- Institute of Theoretical Physics, TU Bergakademie Freiberg, Freiberg 09599, Germany
- Center for Advanced Systems Understanding (CASUS), Görlitz 02826, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden 01328, Germany
| | - Kai Trepte
- Taiwan Semiconductor Manufacturing Company North America, San Jose, California 95134
| | - Alexander Croy
- Institute for Physical Chemistry, Friedrich Schiller University, Jena 07743, Germany
| | - Jens Kortus
- Institute of Theoretical Physics, TU Bergakademie Freiberg, Freiberg 09599, Germany
| | - Stefanie Gräfe
- Institute for Physical Chemistry, Friedrich Schiller University, Jena 07743, Germany
| |
Collapse
|
5
|
Drnovsek E, Rommel M, Bierling AL, Croy A, Croy I, Hummel T. An olfactory perceptual fingerprint in people with olfactory dysfunction due to COVID-19. Chem Senses 2023; 48:bjad050. [PMID: 38098233 DOI: 10.1093/chemse/bjad050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024] Open
Abstract
The sense of smell is based on sensory detection of the molecule(s), which is then further perceptually interpreted. A possible measure of olfactory perception is an odor-independent olfactory perceptual fingerprint (OPF) defined by Snitz et al. We aimed to investigate whether OPF can distinguish patients with olfactory dysfunction (OD) due to coronavirus disease (COVID-19) from controls and which perceptual descriptors are important for that separation. Our study included 99 healthy controls and 41 patients. They rated 10 odors using 8 descriptors such as "pleasant," "intense," "familiar," "warm," "cold," "irritating," "edible," and "disgusting." An unsupervised machine learning method, hierarchical cluster analysis, showed that OPF can distinguish patients from controls with an accuracy of 83%, a sensitivity of 51%, and a specificity of 96%. Furthermore, a supervised machine learning method, random forest classifier, showed that OPF can distinguish patients and controls in the testing dataset with an accuracy of 86%, a sensitivity of 64%, and a specificity of 96%. Principal component analysis and random forest classifier showed that familiarity and intensity were the key qualities to explain the variance of the data. In conclusion, people with COVID-19-related OD have a fundamentally different olfactory perception.
Collapse
Affiliation(s)
- Eva Drnovsek
- Smell and Taste Clinic, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Maria Rommel
- Smell and Taste Clinic, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Antonie Louise Bierling
- Institute for Materials Science, Technische Universität Dresden, 01062 Dresden, Germany
- Department of Psychotherapy and Psychosomatics, Technische Universität Dresden, 01062 Dresden, Germany
- Department of Clinical Psychology, Friedrich-Schiller-University of Jena, 07743 Jena, Germany
| | - Alexander Croy
- Institute of Physical Chemistry, Friedrich-Schiller-University of Jena, 07743 Jena, Germany
| | - Ilona Croy
- Department of Psychotherapy and Psychosomatics, Technische Universität Dresden, 01062 Dresden, Germany
- Department of Clinical Psychology, Friedrich-Schiller-University of Jena, 07743 Jena, Germany
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| |
Collapse
|
6
|
Pastoetter DL, Liu Y, Addicoat MA, Paasch S, Dianat A, Bodesheim D, Waentig AL, Xu S, Borrelli M, Croy A, Richter M, Brunner E, Cuniberti G, Feng X. Control of Crystallinity of Vinylene‐Linked Two‐Dimensional Conjugated Polymers by Rational Monomer Design. Chemistry 2022; 28:e202104502. [PMID: 35157327 PMCID: PMC9314868 DOI: 10.1002/chem.202104502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Indexed: 11/09/2022]
Abstract
The interest in two‐dimensional conjugated polymers (2D CPs) has increased significantly in recent years. In particular, vinylene‐linked 2D CPs with fully in‐plane sp2‐carbon‐conjugated structures, high thermal and chemical stability, have become the focus of attention. Although the Horner‐Wadsworth‐Emmons (HWE) reaction has been recently demonstrated in synthesizing vinylene‐linked 2D CPs, it remains largely unexplored due to the challenge in synthesis. In this work, we reveal the control of crystallinity of 2D CPs during the solvothermal synthesis of 2D‐poly(phenylene‐quinoxaline‐vinylene)s (2D‐PPQVs) and 2D‐poly(phenylene‐vinylene)s through the HWE polycondensation. The employment of fluorinated phosphonates and rigid aldehyde building blocks is demonstrated as crucial factors in enhancing the crystallinity of the obtained 2D CPs. Density functional theory (DFT) calculations reveal the critical role of the fluorinated phosphonate in enhancing the reversibility of the (semi)reversible C−C single bond formation.
Collapse
Affiliation(s)
- Dominik L. Pastoetter
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
- Department of Synthetic Materials and Functional Devices Max-Planck Institute of Microstructure Physics 06120 Halle Germany
| | - Yannan Liu
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
| | - Matthew A. Addicoat
- School of Science and Technology Nottingham Trent University Clifton Lane Nottingham NG118NS United Kingdom
| | - Silvia Paasch
- Chair of Bioanalytical Chemistry, Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
| | - Arezoo Dianat
- Chair of Material Science and Nanotechnology, Faculty of Mechanical Science and Engineering Technische Universität Dresden 01062 Dresden Germany
| | - David Bodesheim
- Chair of Material Science and Nanotechnology, Faculty of Mechanical Science and Engineering Technische Universität Dresden 01062 Dresden Germany
| | - Albrecht L. Waentig
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
| | - Shunqi Xu
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
- Department of Synthetic Materials and Functional Devices Max-Planck Institute of Microstructure Physics 06120 Halle Germany
| | - Mino Borrelli
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
| | - Alexander Croy
- Chair of Theoretical Chemistry Institute of Physical Chemistry Friedrich Schiller University Jena 07737 Jena Germany
| | - Marcus Richter
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
| | - Eike Brunner
- Chair of Bioanalytical Chemistry, Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
| | - Gianaurelio Cuniberti
- Chair of Material Science and Nanotechnology, Faculty of Mechanical Science and Engineering Technische Universität Dresden 01062 Dresden Germany
| | - Xinliang Feng
- Chair of Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
- Department of Synthetic Materials and Functional Devices Max-Planck Institute of Microstructure Physics 06120 Halle Germany
| |
Collapse
|
7
|
Lin HH, Croy A, Gutierrez R, Joachim C, Cuniberti G. A nanographene disk rotating a single molecule gear on a Cu(111) surface. Nanotechnology 2022; 33:175701. [PMID: 35026738 DOI: 10.1088/1361-6528/ac4b4b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
On Cu(111) surface and in interaction with a single hexa-tert-butylphenylbenzene molecule-gear, the rotation of a graphene nanodisk was studied using the large-scale atomic/molecular massively parallel simulator molecular dynamics simulator. To ensure a transmission of rotation to the molecule-gear, the graphene nanodisk is functionalized on its circumference bytert-butylphenyl chemical groups. The rotational motion can be categorized underdriving, driving and overdriving regimes calculating the locking coefficient of this mechanical machinery as a function of external torque applied to the nanodisk. The rotational friction with the surface of both the phononic and electronic contributions is investigated. For small size graphene nanodisks, the phononic friction is the main contribution. Electronic friction dominates for the larger disks putting constrains on the experimental way of achieving the transfer of rotation from a graphene nanodisk to a single molecule-gear.
Collapse
Affiliation(s)
- H-H Lin
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, D-01069 Dresden, Germany
| | - A Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, D-01069 Dresden, Germany
| | - R Gutierrez
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, D-01069 Dresden, Germany
| | - C Joachim
- GNS and MANA Satellite, CEMES-CNRS, 29 rue J. Marvig, F-31055 Toulouse Cedex, France
| | - G Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, D-01069 Dresden, Germany
| |
Collapse
|
8
|
Lin HH, Heinze J, Croy A, Gutiérrez R, Cuniberti G. Effect of lubricants on the rotational transmission between solid-state gears. Beilstein J Nanotechnol 2022; 13:54-62. [PMID: 35059276 PMCID: PMC8744455 DOI: 10.3762/bjnano.13.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 12/03/2021] [Indexed: 06/14/2023]
Abstract
Lubricants are widely used in macroscopic mechanical systems to reduce friction and wear. However, on the microscopic scale, it is not clear to what extent lubricants are beneficial. Therefore, in this study, we consider two diamond solid-state gears at the nanoscale immersed in different lubricant molecules and perform classical MD simulations to investigate the rotational transmission of motion. We find that lubricants can help to synchronize the rotational transmission between gears regardless of the molecular species and the center-of-mass distance. Moreover, the influence of the angular velocity of the driving gear is investigated and shown to be related to the bond formation process between gears.
Collapse
Affiliation(s)
- Huang-Hsiang Lin
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, Dresden, Germany
| | - Jonathan Heinze
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, Dresden, Germany
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, Dresden, Germany
| | - Rafael Gutiérrez
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, Dresden, Germany
| |
Collapse
|
9
|
Raptakis A, Croy A, Dianat A, Gutierrez R, Cuniberti G. Exploring the similarity of single-layer covalent organic frameworks using electronic structure calculations. RSC Adv 2022; 12:12283-12291. [PMID: 35480357 PMCID: PMC9027257 DOI: 10.1039/d2ra01007k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 03/14/2022] [Indexed: 12/23/2022] Open
Abstract
Exploiting a similarity metric to classify COFs according to the degree of π-electron conjugation of their bridges.
Collapse
Affiliation(s)
- Antonios Raptakis
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - Alexander Croy
- Institute of Physical Chemistry, Friedrich Schiller University Jena, 07737 Jena, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany
| | - Rafael Gutierrez
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany
| |
Collapse
|
10
|
Ortega-Guerrero A, Sahabudeen H, Croy A, Dianat A, Dong R, Feng X, Cuniberti G. Multiscale Modeling Strategy of 2D Covalent Organic Frameworks Confined at an Air-Water Interface. ACS Appl Mater Interfaces 2021; 13:26411-26420. [PMID: 34034486 DOI: 10.1021/acsami.1c05967] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two-dimensional covalent organic frameworks (2D COFs) have attracted attention as versatile active materials in many applications. Recent advances have demonstrated the synthesis of monolayer 2D COF via an air-water interface. However, the interfacial 2D polymerization mechanism has been elusive. In this work, we have used a multiscale modeling strategy to study dimethylmethylene-bridged triphenylamine building blocks confined at the air-water interface to form a 2D COF via Schiff-base reaction. A synergy between the computational investigations and experiments allowed the synthesis of a 2D-COF with one of the linkers considered. Our simulations complement the experimental characterization and show the preference of the building blocks to be at the interface with a favorable orientation for the polymerization. The air-water interface is shown to be a key factor to stabilize a flat conformation when a dimer molecule is considered. The structural and electronic properties of the monolayer COFs based on the two monomers are calculated and show a semiconducting nature with direct bandgaps. Our strategy provides a first step toward the in silico polymerization of 2D COFs at air-water interfaces capturing the initial steps of the synthesis up to the prediction of electronic properties of the 2D material.
Collapse
Affiliation(s)
- Andres Ortega-Guerrero
- Laboratory of Molecular Simulation (LSMO), Institut des Sciences et Ingénierie Chimiques, Valais Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'Industrie 17, CH-1951 Sion, Valais, Switzerland
| | - Hafeesudeen Sahabudeen
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
- Center for Advancing Electronics Dresden (CFAED), Technische Universität Dresden, 01062 Dresden, Germany
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Teltow 14513, Germany
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062 Dresden, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062 Dresden, Germany
| | - Renhao Dong
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
- Center for Advancing Electronics Dresden (CFAED), Technische Universität Dresden, 01062 Dresden, Germany
| | - Xinliang Feng
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
- Center for Advancing Electronics Dresden (CFAED), Technische Universität Dresden, 01062 Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062 Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), Technische Universität Dresden, 01062 Dresden, Germany
| |
Collapse
|
11
|
Raptakis A, Dianat A, Croy A, Cuniberti G. Predicting the bulk modulus of single-layer covalent organic frameworks with square-lattice topology from molecular building-block properties. Nanoscale 2021; 13:1077-1085. [PMID: 33393581 DOI: 10.1039/d0nr07666j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two-dimensional Covalent Organic Frameworks (2D COFs) have attracted a lot of interest because of their potential for a broad range of applications. Different combinations of their molecular building blocks can lead to new materials with different physical and chemical properties. In this study, the elasticity of different single-layer tetrabenzoporphyrin (H2-TBPor) and phthalocyanine (H2-Pc) based 2D COFs is numerically investigated using a density-functional based tight-binding approach. Specifically, we calculate the 2D bulk modulus and the equivalent spring constants of the respective molecular building-blocks. Using a spring network model we are able to predict the 2D bulk modulus based on the properties of the isolated molecules. This provides a path to optimize elastic properties of 2D COFs.
Collapse
Affiliation(s)
- Antonios Raptakis
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany. and Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany.
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany.
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany. and Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany
| |
Collapse
|
12
|
Götz R, Ly KH, Wrzolek P, Dianat A, Croy A, Cuniberti G, Hildebrandt P, Schwalbe M, Weidinger IM. Influence of Mesityl and Thiophene Peripheral Substituents on Surface Attachment, Redox Chemistry, and ORR Activity of Molecular Iron Porphyrin Catalysts on Electrodes. Inorg Chem 2019; 58:10637-10647. [DOI: 10.1021/acs.inorgchem.9b00043] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Robert Götz
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| | - Khoa H. Ly
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| | - Pierre Wrzolek
- Institute of Chemistry, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Giancarlo Cuniberti
- Center for Advancing Electronics, Dresden Center for Computational Materials Science, Dresden University of Technology, 01062 Dresden, Germany
| | - Peter Hildebrandt
- Institute of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Matthias Schwalbe
- Institute of Chemistry, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Inez M. Weidinger
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| |
Collapse
|
13
|
Huang S, Croy A, Bezugly V, Cuniberti G. Stabilization of aqueous graphene dispersions utilizing a biocompatible dispersant: a molecular dynamics study. Phys Chem Chem Phys 2019; 21:24007-24016. [DOI: 10.1039/c9cp04742e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Investigation of the high efficiency of flavin mononucleotide sodium salt (FMNS) for the stabilization of aqueous graphene dispersions using all-atom molecular dynamics simulations.
Collapse
Affiliation(s)
- Shirong Huang
- Institute for Materials Science and Max Bergmann Center for Biomaterials
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center for Biomaterials
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Viktor Bezugly
- Institute for Materials Science and Max Bergmann Center for Biomaterials
- Technische Universität Dresden
- 01062 Dresden
- Germany
- Life Science Inkubator Sachsen GmbH & Co. KG
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center for Biomaterials
- Technische Universität Dresden
- 01062 Dresden
- Germany
- Dresden Center for Computational Materials Science (DCMS)
| |
Collapse
|
14
|
Abstract
In order to understand the relation of strain and material properties, both a microscopic model connecting a given strain to the displacement of atoms, and a macroscopic model relating applied stress to induced strain, are required. Starting from a valence-force model for black phosphorous [Kaneta et al., Solid State Communications, 1982, 44, 613] we use recent experimental and computational results to obtain an improved set of valence-force parameters for phosphorene. From the model we calculate the phonon dispersion and the elastic properties of single-layer phosphorene. Finally, we use these results to derive a complete continuum model, including the bending rigidities, valid for long-wavelength deformations of phosphorene. This continuum model is then used to study the properties of pressurized suspended phosphorene sheets.
Collapse
Affiliation(s)
- Daniel Midtvedt
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden.
| | - Alexander Croy
- Max-Planck-Institute for the Physics of Complex Systems, Dresden, Germany.
| |
Collapse
|
15
|
Eriksson AM, Midtvedt D, Croy A, Isacsson A. Corrigendum:(2013 Nanotechnology {\bf 24} 395702)]{Corrigendum: Frequency tuning, nonlinearities and mode coupling in circular mechanical graphene resonators (2013 Nanotechnology {\bf 24} 395702). Nanotechnology 2017; 28:249501. [PMID: 28489017 DOI: 10.1088/1361-6528/aa722e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Axel Martin Eriksson
- Applied Physics,Chalmers University of Technology, Origogården 1, 412 96 Gothenburg, Gothenburg,SWEDEN
| | - Daniel Midtvedt
- Chalmers tekniska hogskola Institutionen for Teknisk fysik, Goteborg, 412 96,SWEDEN
| | - Alexander Croy
- Max-Planck-Institut fuer Physik komplexer Systeme, Noethnitzer Strasse 38, 01187 Dresden, Dresden,GERMANY
| | - Andreas Isacsson
- Department of Applied Physics,Chalmers University of Technology, SE-412 96 Goteborg, Göteborg,SWEDEN
| |
Collapse
|
16
|
Abstract
A multi-scale approach for the theoretical description of deformed phosphorene is presented. This approach combines a valence-force model to relate macroscopic strain to microscopic displacements of atoms and a tight-binding model with distance-dependent hopping parameters to obtain electronic properties. The resulting self-consistent electromechanical model is suitable for large-scale modeling of phosphorene devices. We demonstrate this for the case of inhomogeneously deformed phosphorene drum, which may be used as an exciton funnel.
Collapse
Affiliation(s)
- Daniel Midtvedt
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | | | | |
Collapse
|
17
|
Midtvedt D, Croy A. Comment on 'Parametrization of Stillinger-Weber potential based on a valence force field model: application to single-layer MoS2 and black phosphorus'. Nanotechnology 2016; 27:238001. [PMID: 27121075 DOI: 10.1088/0957-4484/27/23/238001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We compare the simplified valence-force model for single-layer black phosphorus with the original model and recent ab initio results. Using an analytic approach and numerical calculations we find that the simplified model yields Young's moduli that are smaller compared to the original model and are almost a factor of two smaller than ab initio results. Moreover, the Poisson ratios are an order of magnitude smaller than values found in the literature.
Collapse
Affiliation(s)
- Daniel Midtvedt
- Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, D-01187 Dresden, Germany
| | | |
Collapse
|
18
|
Abstract
Vacancies in graphene lead to the appearance of localized electronic states with non-vanishing spin moments. Using a mean-field Hubbard model and an effective double-quantum dot description we investigate the influence of strain on localization and magnetic properties of the vacancy-induced states in semiconducting armchair nanoribbons. We find that the exchange splitting of a single vacancy and the singlet-triplet splitting for two vacancies can be widely tuned by applying uniaxial strain, which is crucial for spintronic applications.
Collapse
Affiliation(s)
- Daniel Midtvedt
- Max-Planck-Institut für Physik komplexer Systeme, 01187 Dresden, Germany
| | | |
Collapse
|
19
|
Midtvedt D, Croy A, Isacsson A, Qi Z, Park HS. Fermi-Pasta-Ulam physics with nanomechanical graphene resonators: intrinsic relaxation and thermalization from flexural mode coupling. Phys Rev Lett 2014; 112:145503. [PMID: 24765986 DOI: 10.1103/physrevlett.112.145503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Indexed: 06/03/2023]
Abstract
Thermalization in nonlinear systems is a central concept in statistical mechanics and has been extensively studied theoretically since the seminal work of Fermi, Pasta, and Ulam. Using molecular dynamics and continuum modeling of a ring-down setup, we show that thermalization due to nonlinear mode coupling intrinsically limits the quality factor of nanomechanical graphene drums and turns them into potential test beds for Fermi-Pasta-Ulam physics. We find the thermalization rate Γ to be independent of radius and scaling as Γ∼T*/εpre2, where T* and εpre are effective resonator temperature and prestrain.
Collapse
Affiliation(s)
- Daniel Midtvedt
- Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Alexander Croy
- Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Andreas Isacsson
- Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Zenan Qi
- Department of Mechanical Engineering, Boston University, Boston, Massachsetts 02215, USA
| | - Harold S Park
- Department of Mechanical Engineering, Boston University, Boston, Massachsetts 02215, USA
| |
Collapse
|
20
|
Eriksson AM, Midtvedt D, Croy A, Isacsson A. Frequency tuning, nonlinearities and mode coupling in circular mechanical graphene resonators. Nanotechnology 2013; 24:395702. [PMID: 24008430 DOI: 10.1088/0957-4484/24/39/395702] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We study circular nanomechanical graphene resonators by means of continuum elasticity theory, treating them as membranes. We derive dynamic equations for the flexural mode amplitudes. Due to the geometrical nonlinearity the mode dynamics can be modeled by coupled Duffing equations. By solving the Airy stress problem we obtain analytic expressions for the eigenfrequencies and nonlinear coefficients as functions of the radius, suspension height, initial tension, back-gate voltage and elastic constants, which we compare with finite element simulations. Using perturbation theory, we show that it is necessary to include the effects of the non-uniform stress distribution for finite deflections. This correctly reproduces the spectrum and frequency tuning of the resonator, including frequency crossings.
Collapse
Affiliation(s)
- A M Eriksson
- Department of Applied Physics, Chalmers University of Technology SE-412 96, Göteborg, Sweden
| | | | | | | |
Collapse
|
21
|
Schmidt R, Marksteiner M, Dal-Bianco P, Ransmayr G, Bancher C, Benke T, Wancata J, Fischer P, Leblhuber CF, Psota G, Ackerl M, Alf C, Berek K, Croy A, Delazer M, Fasching P, Frühwald T, Fruhwürth G, Fuchs-Nieder B, Gatterer G, Grossmann J, Hinterhuber H, Iglseder B, Imarhiagbe D, Jagsch C, Jellinger K, Kalousek M, Kapeller P, Ladurner G, Lampl C, Lechner A, Lingg A, Nakajima T, Rainer M, Reisecker F, Spatt J, Walch T, Uranüs M, Walter A. [Consensus statement "Dementia 2010" of the Austrian Alzheimer Society]. Neuropsychiatr 2010; 24:67-87. [PMID: 20605003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The Austrian Alzheimer Society developed evidence-based guidelines based on a systematic literature search and criteria-guided assessment with subsequent transparent determination of grades of clinical recommendation. The authors evaluated currently available therapeutic approaches for the most common forms of dementia and focused on diagnosis and pharmacological intervention, taking into consideration the situation in Austria. The purpose of these guidelines is the rational and cost-effective use of diagnostic and therapeutic measures in dementing illnesses. Users are physicians and all other providers of care for patients with dementia in Austria.
Collapse
Affiliation(s)
- Reinhold Schmidt
- Universitätsklinik für Neurologie, Medizinische Universität Graz,
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Gilary I, Sajeev Y, Ciappina MF, Croy A, Goletz CM, Klaiman S, Sindelka M, Winter M, Wustmann W, Moiseyev N. Suppression of photoionization by a static field. Phys Rev Lett 2008; 101:163002. [PMID: 18999663 DOI: 10.1103/physrevlett.101.163002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Indexed: 05/27/2023]
Abstract
The dc field Stark effect is studied theoretically for atoms in high intensity laser fields. We prove that the first-order perturbation corrections for the energy and photoionization rate vanish when the dc field strength serves as a perturbational strength parameter. Our calculations show that by applying a dc field in the same direction as the polarization direction of the ac field, the photoinduced ionization rate is almost entirely suppressed. This suppression is attributed to changes in the phase shift of the continuum atomic wave functions which can be controlled by the dc field.
Collapse
Affiliation(s)
- Ido Gilary
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel
| | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Abstract
Beside the loss of the memory capacity, non-cognitive disturbances occur up to 70%-90% in patients suffering from Alzheimer's disease due to pathological changes in the brain. Delusion, hallucination and changes of the circadian rhythm can appear in addition to the five kinds of disorder--agitation, aggressive behaviour, screaming, depression and constant hyperkinesia. The consequences of these changes in perception and behaviour constitute severe problems for the patient as well as for the main caregiver. The burden of caring often exceeds their energy and resources. Not only do many of those caregivers suffer themselves from exhaustion but also from feelings of guilt and depression. The therapeutic concept includes the involvement of the relatives through information, support, counselling and guidance as much as the investigation of the causes and interrelation of the problematic behaviour in each individual case and further involves the carer in creating a concept to deal in an optimal way with the patient.
Collapse
Affiliation(s)
- M Rainer
- Memory-Clinic und psychiatrischen Abteilung des Donauspitals im SMZ-Ost der Stadt Wien
| | | | | |
Collapse
|
24
|
Croy A. Ethical question concerning maternity leave poorly handled. Can Vet J 1993; 34:584. [PMID: 17424300 PMCID: PMC1686633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
|