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Quantum healing

Isaac Nape, Eileen Otte, Adam Vallés, Carmelo Rosales-Guzmán, Filippo Cardano, Cornelia Denz, Andrew Forbes
Using spatial modes for quantum key distribution (QKD) has become highly topical due to their infinite dimensionality, promising high information capacity per photon. However, spatial distortions reduce the feasible secret key rates and compromise the security of a quantum channel. In an extreme form such a distortion might be a physical obstacle, impeding line-of-sight for free-space channels. Here, by controlling the radial degree of freedom of a photon's spatial mode, we are able to demonstrate hybrid high-dimensional QKD through obstacles with self-reconstructing single photons...
October 15, 2018: Optics Express
Yi Ren, Jing Liu
Conventional electrical circuits are generally rigid in their components and working styles, which are not flexible and stretchable. As an alternative, liquid-metal-based soft electronics offer important opportunities for innovation in modern bioelectronics and electrical engineering. However, their operation in wet environments such as aqueous solution, biological tissue or allied subjects still encounters many technical challenges. Here, we propose a new conceptual electrical circuit, termed as droplet circuit, to fulfill the special needs described above...
May 5, 2018: Micromachines
Eric Moyen, Haeyeon Jun, Hyo-Min Kim, Jin Jang
Inorganic cesium lead bromide quantum dots (CsPbBr3 QDs) are usually synthesized via a high temperature process (hot injection, HI). This process is similar to that used for the synthesis of other semiconductor QDs (i.e. CdSe@ZnS), which limits their potential cost advantage. CsPbBr3 QDs can also be synthesized at room temperature (RT) in a low cost and easily scalable process which, thus, is one of the greatest advantages of the CsPbBr3 QDs. However, LEDs fabricated using RT-QDs exhibit poor performance compared to those of HI-QDs...
November 12, 2018: ACS Applied Materials & Interfaces
Shu-Chen Wei, Chien-Chih Tung, Meng-Tzu Weng, Jau-Min Wong
Background/Aims: Fecal calprotectin (fC) level is a predictive marker of mucosal healing for patients with inflammatory bowel disease (IBD). Home fC tests are now available. We evaluated the performance of the smartphone-based IBDoc home testing system in patients with IBD and obtained their feedback as an objective patient-reported outcome. Methods: This prospective study enrolled consecutive patients with IBD in clinical remission. fC in the same stool sample was assessed by using both the laboratory test (Quantum Blue calprotectin test) and home test (IBDoc)...
October 2018: Intestinal Research
Zhen Zhu, Tay-Rong Chang, Cheng-Yi Huang, Haiyang Pan, Xiao-Ang Nie, Xin-Zhe Wang, Zhe-Ting Jin, Su-Yang Xu, Shin-Ming Huang, Dan-Dan Guan, Shiyong Wang, Yao-Yi Li, Canhua Liu, Dong Qian, Wei Ku, Fengqi Song, Hsin Lin, Hao Zheng, Jin-Feng Jia
Non-symmorphic crystals are generating great interest as they are commonly found in quantum materials, like iron-based superconductors, heavy-fermion compounds, and topological semimetals. A new type of surface state, a floating band, was recently discovered in the nodal-line semimetal ZrSiSe, but also exists in many non-symmorphic crystals. Little is known about its physical properties. Here, we employ scanning tunneling microscopy to measure the quasiparticle interference of the floating band state on ZrSiSe (001) surface and discover rotational symmetry breaking interference, healing effect and half-missing-type anomalous Umklapp scattering...
October 8, 2018: Nature Communications
Hongzhou Liu, Jie Peng, Meizhen Zhao, Pei Ma, Jun Zhong, Shuang Li, Zhongxin Lu
Delta-like 4 (DLL4) is a membrane‑bound ligand, which belongs to the Notch signaling pathway and plays important roles in angiogenesis and vascular development. The expression of DLL4 in non‑small cell lung cancer (NSCLC) remains unclear. Therefore, DLL4 expression was detected in clinical specimens using quantum dots (QDs)‑immunohistochemistry (IHC) and lung cancer cell lines by quantitative real‑time polymerase chain reaction. The protein levels of DLL4 were decreased in the tumor tissues of NSCLC patients and lung cancer cell lines...
November 2018: Oncology Reports
Sougata Datta, Manik Lal Saha, Peter J Stang
Hierarchical self-assembly (HAS) is a multilevel organization process that first assembles elementary molecular units into ordered secondary structures via noncovalent interactions, which further act as the building blocks to form more complex multifunctional superstructures at the next level(s). The HAS strategy has been used as a versatile method for the preparation of soft-matter nanoarchitectures of defined size and morphologies, tunable luminescence, and biological importance. However, such preparation can be greatly simplified if well-defined dynamic structures are employed as the cores that upon linking form the desired nanoarchitectures...
September 18, 2018: Accounts of Chemical Research
Shrawan Roy, Wooseon Choi, Sera Jeon, Do-Hwan Kim, Hyun Kim, Seok Joon Yun, Yongjun Lee, Jaekwang Lee, Young-Min Kim, Jeongyong Kim
Chemical treatment using bis(trifluoromethane) sulfonimide (TFSI) was shown to be particularly effective for increasing the photoluminescence (PL) of monolayer (1L) MoS2 , suggesting a convenient method for overcoming the intrinsically low quantum yield of this material. However, the underlying atomic mechanism of the PL enhancement has remained elusive. Here, we report the microscopic origin of the defect healing observed in TFSI-treated 1L-MoS2 through a correlative combination of optical characterization and atomic-scale scanning transmission electron microscopy, which showed that most of the sulfur vacancies were directly repaired by the extrinsic sulfur atoms produced from the dissociation of TFSI, concurrently resulting in a significant PL enhancement...
July 11, 2018: Nano Letters
Vishnu Nair, Anil Kumar, Chandramouli Subramaniam
Photo-responsive, electrically conductive nanostructures are highly desirable for wide-ranging applications in energy harvesting, nanophotonic and optoelectronic devices. To this end, we realize self-assembled, photoconductive hybrids of poly(3-hexylthiophene) (P3HT) micro- and nano-fibers integrated with MoS2 quantum dots (QDs). We present an innovative strategy to impregnate QDs within the walls of the P3HT fibers resulting in the emergence of the controllable photoconductivity of the QD-P3HT hybrid. The maximum photoconductivity (>80% higher than pristine P3HT) is observed at 360 nm and originates from a synergistic combination of (a) defect healing and quenching of surface trap states in QDs by P3HT and (b) efficient generation and transfer of photo-excited charges from P3HT to QDs...
June 7, 2018: Nanoscale
Theodoros G Chatzimitakos, Athanasia I Kasouni, Anastassios N Troganis, Constantine D Stalikas
A simple yet effective method is employed to prepare multifunctional fluorescent carbon nanodots (CNDs) from human fingernails. The results demonstrate that the CNDs have excellent optical properties and a quantum yield of 81%, which is attributed to the intrinsic composition of the precursor material itself. The CNDs are used to develop an ultrasensitive fluorescent probe for the detection of hexavalent chromium (limit of detection: 0.3 nM) via a combined inner-filter and static mechanism. Moreover, the toxicity of the CNDs over four epithelial cell lines is assessed...
May 9, 2018: ACS Applied Materials & Interfaces
Zhao-Xiang Fang, Yue Chen, Yu-Xuan Ren, Lei Gong, Rong-De Lu, An-Qi Zhang, Hong-Ze Zhao, Pei Wang
Photons in an optical vortex usually carry orbital angular momentum, which boosts the application of the micro-rotation of absorbing particles and quantum information encoding. Such photons propagate along a straight line in free space or follow a curved trace once guided by an optical fiber. Teleportation of an optical vortex using a beam with non-diffraction and self-healing is quite challenging. We demonstrate the manipulation of the propagation trace of an optical vortex with a symmetric Airy beam (SAB) and found that the SAB experiences self-rotation with the implementation of a topological phase structure of coaxial vortex...
March 19, 2018: Optics Express
Fernando Ruipérez, Maialen Galdeano, Ekiñe Gimenez, Jon M Matxain
The theoretical self-healing capacity of new sulfenamide-based disulfides is estimated by using theoretical methods of quantum chemistry. Starting from previously studied aromatic disulfides, the influence of inserting a NH group between the disulfide and the phenyl ring (forming the sulfenamide), as well as the role of the phenyl ring in the self-healing process is analyzed. Three parameters are used in the evaluation of the self-healing capacity: i) the probability to generate sulfenyl radicals, which is the first step of the process; ii) the effect of the hydrogen bonding, which affects the mobility of the chains; and iii) the height of the exchange reaction barrier...
March 2018: ChemistryOpen
Jacopo M Fontana, Huijuan Yin, Yun Chen, Ricardo Florez, Hjalmar Brismar, Ying Fu
Colloidal semiconductor quantum dots (QDs) have been extensively researched and developed for biomedical applications, including drug delivery and biosensing assays. Hence, it is pivotal to understand their behavior in terms of intracellular transport and toxicological effects. In this study, we focused on 3-mercaptopropionic acid-coated CdSe-CdS/ZnS core-multishell quantum dots (3MPA-QDs) converted from the as-grown octadecylamine-coated quantum dots (ODA-QDs) and their direct and dynamic interactions with human umbilical vein endothelial cells (HUVECs)...
2017: International Journal of Nanomedicine
Sun-Ho Lee, Min-Ju Kim, Kiju Chang, Eun Mi Song, Sung Wook Hwang, Sang Hyoung Park, Dong-Hoon Yang, Kyung-Jo Kim, Jeong-Sik Byeon, Seung-Jae Myung, Suk-Kyun Yang, Byong Duk Ye
BACKGROUND: We aimed to evaluate the role of fecal calprotectin (FC) as a noninvasive marker for the disease activity of ulcerative colitis (UC) in a Korean cohort. METHODS: A total of 181 fecal samples were collected from 181 consecutive UC patients between April 2015 and September 2016. FC levels were measured using the Quantum Blue® Calprotectin rapid test. The laboratory test results, partial Mayo Score (pMS), and colonoscopic imaging findings at FC level measurement were retrospectively reviewed...
October 23, 2017: BMC Gastroenterology
Carlo Giansante, Ivan Infante
Surface traps are ubiquitous to nanoscopic semiconductor materials. Understanding their atomistic origin and manipulating them chemically have capital importance to design defect-free colloidal quantum dots and make a leap forward in the development of efficient optoelectronic devices. Recent advances in computing power established computational chemistry as a powerful tool to describe accurately complex chemical species and nowadays it became conceivable to model colloidal quantum dots with realistic sizes and shapes...
October 19, 2017: Journal of Physical Chemistry Letters
Jing Chen, Shuya Li, Ye Zhang, Wei Wang, Xiang Zhang, Yangyang Zhao, Yucai Wang, Hong Bi
While reloadable drug delivery platforms are highly prized for the treatment of a broad spectrum of diseases, the gel-gel interface between hydrogels hinders the intergel diffusive transport of drugs and thus limits the application of hydrogels as reloadable depots. Here, this study reports the circumvention of this barrier by employing a self-healing hydrogel prepared from N-carboxyethyl chitosan and sodium alginate dialdehyde, which are cross-linked via a reversible Schiff base linkage. The injectable and bioadhesive hydrogel shows a rapid gelation time of 47 s...
November 2017: Advanced Healthcare Materials
Scott G Harroun, Jui-Yang Lai, Chih-Ching Huang, Shou-Kuan Tsai, Han-Jia Lin
Using polyamines as the initial organic raw material and by applying simple pyrolysis methods, super cationic carbon quantum dots (CQDs) can easily be made. Since polyamines are natural products and the synthesis procedure is green, these polyamine-derived CQDs display low toxicity and high biocompatibility but possess high antibacterial activity. In addition, polyamine-derived CQDs display other unique properties, such as facilitation of wound healing and passage through the tight junction, which make them a very promising bactericide in future clinical applications...
November 10, 2017: ACS Infectious Diseases
Marco Fraccalvieri, Marco Salomone, Claudia Di Santo, Erind Ruka, Umberto Morozzo, Stefano Bruschi
Chronic wounds are commonly associated with high morbidity rates due to the patient's need of frequent dressing changes and repeated visits to the outpatient wound clinic. Furthermore, chronic wounds are often characterised by severe pain, which can cause significant disability to the patient. New technologies aim to develop an optimal device to reduce discomfort of the patient and to heal wounds. The device Rexon-age® is introduced for the first time in wound healing, and preliminary data on clinical and histological results are shown...
December 2017: International Wound Journal
Elena Formoso, José M Asua, Jon M Matxain, Fernando Ruipérez
In this work, a theoretical protocol based on classical molecular dynamics has been defined, in order to study weak non-covalent interactions in diphenyl disulfide based compounds. This protocol is then used to study the influence of hydrogen bonds and π-π stacking in four selected cases, namely, monosubstituted and amine ortho trisubstituted urea and urethane-based diphenyl disulfides. In all cases, it has been observed that hydrogen bonds are much more relevant than π-π stacking, which has little influence...
July 19, 2017: Physical Chemistry Chemical Physics: PCCP
Yong Liu, Yi Zhao, Hao Luo, Fei Liu, YanMin Wu
Gefitinib/Quantum dots (QDs) loaded peptide long circulating liposomes (G/QDs-P-LCPL) were successfully prepared for treatment and detection by fluorescence labeling for nasopharyngeal carcinoma. Gefitinib was found to have marked inhibition which is dose- and time-dependent. Hoechst 33258 florescence staining and wound-healing assay indicated that as G/QDs-P-LCPL concentration increased, HONE1 staining cells decreased, while the amount of nucleus pyknosis and karyorrhexis grew. Florescence tracing result shows that the drug mainly distributed through tumors...
August 19, 2017: Biochemical and Biophysical Research Communications
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