Antimonene fabricated by mechanical exfoliation is highly stable under atmospheric conditions over periods of months and even when immersed in water. Density functional theory confirms the ...experiments and predicts an electronic gap of ≈1 eV. These results highlight the use of antimonene for optoelectronics applications.
2D materials show outstanding properties that can bring many applications in different technological fields. However, their uses are still limited by production methods. In this context, antimonene ...is recently suggested as a new 2D material to fabricate different (opto)electronic devices, among other potential applications. This work focuses on optimizing the synthetic parameters to produce high‐quality antimonene hexagons and their implementation in a large‐scale manufacturing procedure. By means of a continuous‐flow synthesis, few‐layer antimonene hexagons with ultra‐large lateral dimensions (up to several microns) and a few nanometers thick are isolated. The suitable chemical post‐treatment of these nanolayers with chloroform gives rise to antimonene surfaces showing low oxidation that can be easily contacted with microelectrodes. Therefore, the reported procedure offers a way to solve two critical problems for using antimonene in many applications: large‐scale preparation of high‐quality antimonene and the ability to set electrical contacts useful for device fabrication.
A continuous‐flow synthesis approach offers large‐scale preparation of high‐quality few‐layer antimonene (FLA) hexagons. This procedure is based on colloidal synthesis followed by a post‐treatment with chloroform to isolate FLA hexagons which present ultra‐large lateral dimensions and a few nanometers thickness. Mechanical and electrical analyses reveal their high‐quality and low surface oxidation, opening the door for applications in electronics and beyond.
On page 6332, J. Gómez‐Herrero, F. Zamora, and co‐workers describe the isolation of antimonene, a new allotrope of antimony that consists of a single layer of atoms. They obtain antimonene flakes by ...the scotch tape method; these flakes are highly stable in ambient conditions and even when immersed in water. The 1.2 eV gap calculated in this study suggests potential applications in optoelectronics.
•High-quality few-layer bismuthene hexagons are prepared by solution phase synthesis under mild conditions.•The few-layer bismuthene hexagons present ultra-large areas and a few nanometers ...thicknesses.•The bismuth nanolayers present low oxidation surfaces and can be contacted with microelectrodes.•NADH sensor was fabricated where few-layers bismuthene act as electrocatalytic platforms.•The resulting sensor revealed high analytical performance in terms of sensitivity, selectivity, and reproducibility.
Many different two-dimensional (2D) materials have been reported and studied so-far showing outstanding physico-chemical properties that are expected to create many applications in various technological fields. However, the fabrication of many (opto)electronic devices and other components for different applications requires the availability of the material in large quantities. This work reports on a two-step procedure under mild conditions, preparing high-quality few-layer bismuthene (FLB) hexagons in good yield. The FLB hexagons so-formed show ultra-large lateral dimensions, over microns (ca. 2.75 to 4.5 µm), areas up to 30 µm2, while a few nanometers thick (5–20 nm). The chemical post-treatment of these nanolayers with chloroform produces bismuthene surfaces with very low oxidation that can be easily contacted with microelectrodes. FLB hexagons show high conductivity and excellent electrical properties, enabling them to fabricate an adenine dinucleotide (NADH) sensor where FLB hexagons act as electrocatalytic platforms with high capacity for improving the charge transfer process. The resulting sensor revealed high analytical performance in terms of sensitivity, selectivity, and reproducibility.
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Within the oligometastatic state, oligorecurrent lymph node disease in prostate cancer represents an interesting clinical entity characterized by a relatively indolent biology that makes it unique: ...it can be treated radically, and its treatment is usually associated with a long period of control and excellent survival. Additionally, it is an emergent situation that we are facing more frequently mainly due to (a) the incorporation into clinical practice of the PSMA-PET that provides strikingly increased superior images in comparison to conventional imaging, with higher sensitivity and specificity; (b) the higher detection rates of bone and node disease with extremely low levels of PSA; and (c) the availability of high-precision technology in radiotherapy treatments with the incorporation of stereotaxic body radiotherapy (SBRT) or stereotaxic ablative radiotherapy (SABR) technology that allows the safe administration of high doses of radiation in a very limited number of fractions with low toxicity and excellent tolerance. This approach of new image-guided patient management is compelling for doctors and patients since it can potentially contribute to improving the clinical outcome. In this work, we discuss the available evidence, areas of debate, and potential future directions concerning the utilization of new imaging-guided SBRT for the treatment of nodal recurrence in prostate cancer.
Metallic nanowires (NWs) exhibit a number of interesting properties, such as high conductivity, flexibility, and cold‐weldability, making them ideal for nanocircuits. They are usually adsorbed on ...substrates by depositing a colloidal solution of NWs on the surface. However, they remain randomly scattered and solvent residues may contaminate/ degrade the sample. This study presents a method for forming electrical contacts with gold nanowires based on all‐dry deterministic transfer. The process begins with the adsorption of gold nanowires by drop casting the colloidal solution onto a viscoelastic substrate. These wires are transferred to selected locations on the substrate, minimizing manipulation with fabrication times a factor of 2 shorter than direct drop casting deposition, preserving surface and sample conditions, and improving the fabrication of nanocircuits. Atomic force microscopy is used to manipulate the NWs for the final connections, which have contact resistances of a few ohms. To illustrate the technique, three different examples of applicability are presented. This work is expected to be a starting point for expanding the potential of deterministic transfer that is successfully used in 2D materials. For example, to study local electrical transport in heterogeneous samples such as van der Waals heterostructures and twisted layers of 2D materials.
A new methodology for electrical connectivity using gold nanowires based on all‐dry deterministic transfer is presented. Its capabilities are demonstrated for the fabrication of devices for 2D materials characterization and for microcircuit repair, as well as the ability to assemble nanoelectrodes ex situ. This procedure allows for a significant reduction in working time, while maintaining a clean and contamination‐free substrate.
Tailgut cysts (TGCs) are rare tumours which can undergo malignant transformation. The gold standard of treatment is complete surgical excision. Multidisciplinary assessment is advisable in order to ...apply adjuvant treatment. Postoperative radiotherapy should be given in case of compromised surgical margins or other factors such as high histological grade or perineural and lymphovascular invasion. Here, we present a case of a squamous cell carcinoma arising from a retrorectal TGC treated with surgery and postoperative radiotherapy and review the main indications and techniques of this therapy.
Autoimmune dysglycemia syndrome (ADS) is a rare condition that presents as episodes of hypoglycemia as well as hyperglycemia and is classified as insulin autoimmune syndrome (IAS) and type B insulin ...resistance (TBIR). Autoimmunity plays a key role in the pathogenesis of this disorder, as evidenced by the presence of autoantibodies against endogenous insulin or the insulin receptor, and by its association with rheumatologic disorders. Treatment usually includes glycemic control and immunomodulatory agents. We report a case of a 31-year-old woman who was admitted for severe hypoglycemia. Further workup revealed underlying systemic lupus erythematosus (SLE) with renal involvement. During hospitalization, she continued to experience episodes of fasting hypoglycemia, as well as episodes of postprandial hyperglycemia. Hypoglycemia associated with a high serum insulin concentration and positive anti-insulin antibodies were consistent with IAS. Likewise, hyperglycemia and hypoglycemia in association with weight loss, acanthosis nigricans, polycystic ovarian syndrome, and normotriglyceridemia strongly suggested TBIR, although testing for antibodies against the insulin receptor was not available in Peru. Immunosuppressive therapy and metformin were indicated, resulting in remission of SLE and ADS. Years later, the patient exhibited features of dermatomyositis, such as Raynaud’s phenomenon, muscular weakness, heliotrope exanthema, and elevated muscle enzymes. Once again, the patient received immunosuppressive therapy. ADS is an infrequent cause of hypoglycemia, and the coexistence of its two pathophysiological mechanisms in a patient with SLE and subsequent development of dermatomyositis is even more rare. Our case is the first one reported describing this association.
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