Scaling up multispectral color filters with binary lithography and reflow (BLR).

Efforts to increase the number of filters are driven by the demand for miniaturized spectrometers and multispectral imaging. However, processes that rely on sequential fabrication of each filter are cost ineffective. Herein, we introduce an approach to produce at least 16 distinct filters based on a single low-resolution lithographic step with minimum feature size of 0.

Deterministic positioning of few aqueous colloidal quantum dots.

Emerging quantum technologies that critically require the integration of quantum emitters on photonic platforms are hindered by the control over their position, quantity, and scalability. Herein, we describe a facile strategy to deposit aqueous silica-coated quantum dots (QDs) in a template of polymethyl methacrylate (PMMA) nanoholes that leverages saturated ethanol vapor drop-casting and subsequent lift-off of the template. Ethanol vapor incorporation into water droplets during the drying process reduces the meniscus contact angle, which increases capillary forces and enhances particle confinement within the pinning contact region.

Pick and place process for uniform shrinking of 3D printed micro- and nano-architected materials.

Two-photon polymerization lithography is promising for producing three-dimensional structures with user-defined micro- and nanoscale features. Additionally, shrinkage by thermolysis can readily shorten the lattice constant of three-dimensional photonic crystals and enhance their resolution and mechanical properties; however, this technique suffers from non-uniform shrinkage owing to substrate pinning during heating. Here, we develop a simple method using poly(vinyl alcohol)-assisted uniform shrinking of three-dimensional printed structures.

2D-Oriented Attachment of 1D Colloidal Semiconductor Nanocrystals via an Etchant.

The oriented attachment (OA) of 0D semiconductor nanocrystals into 1D and 2D nanostructures with unique properties is useful for the fabrication of quantum confined nanomaterials that are otherwise difficult to produce by direct synthesis. Given that the OA of 1D nanocrystals such as nanorods generally produces linear chains, rod-couple structures, or clustered columns, linking them in a facet-specific manner to produce 2D structures is challenging. Here, we report that 1D CuS nanorods undergo etching on exposure to hexylphosphonic acid under mild heating, which results in an increased curvature and a reduction in surface ligands at those sites.

Branched Heterostructured Semiconductor Nanocrystals with Various Branch Orders a Facet-to-Facet Linking Process.

Branched heterostructured semiconductor nanoparticles such as core seeded tetrapods and octapods offer properties not seen in their spherical core-shell counterparts, but are challenging to synthesize with a large diversity of branch numbers heterogeneous nucleation and growth processes alone. This work describes a process to facet-link matchstick-like AgS-tipped ZnS nanorods their AgS tips, producing branched AgS-centered ZnS nanoparticles such as bipods, tripods, and in general multipods with 4 to 16 ZnS arms as a function of reaction time. The angle between nanorods in the bipods and tripods is found to be close to 120°, resulting in unexpected bent and trigonal planar geometry, respectively.

Study of Gene Expression Profiles of Breast Cancers in Indian Women.

Breast cancer is the most common cancer among women globally. In India, the incidence of breast cancer has increased significantly during the last two decades with a higher proportion of the disease at a young age compared to the west. To understand the molecular processes underlying breast cancer in Indian women, we analysed gene expression profiles of 29 tumours and 9 controls using microarray.

Posttransplant epithelioid inflammatory myofibroblastic sarcoma: A case report.

Epithelioid inflammatory myofibroblastic sarcoma (EIMS) is a rare entity and a novel variant of inflammatory myofibroblastic tumor (IMT), usually seen in children and nonsmoking young adults. Their occurrence in a posttransplant setting is still rare. These tumors are characterized by prominent epithelioid morphology, large histiocytoid "Reed Sternberg"-like cell, unique pattern of ALK immuno-reactivity, and aggressive clinical behavior.

Clinicopathological Evaluation of 223 Cases of Mature Cystic Teratoma, Ovary: 25-Year Experience in a Single Tertiary Care Centre in India.

Introduction: Mature Cystic Teratoma (MCT) is the most common benign neoplasm of the ovary constituting 10-20% of all the ovarian tumours. Although, much has been published about ovarian teratomas, in English literature, there are very few retrospective cross sectional studies from India to understand the epidemiology of the disease.

Aim: To evaluate the prevalence, clinicopathological characteristics and complications of MCT of the ovary.

Spectrum of Childhood and Adolescent Ovarian Tumors in India: 25 Years Experience at a Single Institution.

Background: Ovarian tumour in children and adolescent girls form an uncommon but important part of gynaecological malignancies. They account for 1% of all the childhood malignancies and 8% of all abdominal tumours in children. Since the ovarian cysts are thought to arise from mature follicles, these tumours were considered to be infrequent in the paediatric population.

Diagnosis of sirenomelia in the first trimester.

Sirenomelia or "mermaid syndrome" is a rare congenital abnormality with an incidence of 1 in 60,000. We report a case diagnosed in the first trimester using two-dimensional, three-dimensional, and color Doppler ultrasound. With increasing emphasis on early diagnosis of fetal abnormalities, this case highlights the importance of looking for anomalies in the first trimester itself.

Scrotal leiomyosarcoma associated with bilateral epididymo-orchitis.

Leiomyosarcoma of the scrotum is a rare tumor. We report the case of a 60-year-old man who presented with bilateral testicular enlargement that was clinically misdiagnosed as a testicular tumor. The tumor was excised by bilateral inguinal orchiectomy.

Extraskeletal osteochondroma of the thigh: a case report.

A case of histopathologically proven extraskeletal osteochondroma of the thigh is presented along with its radiographic, CT and MRI findings. This is the first such case reported, to the best of our knowledge. The diagnosis of extraskeletal osteochondroma should be considered when a discrete ossified mass is localised in the soft tissue.