Kinetics of ion-mediated directed self-assembly of one-dimensional chains of metal nanoparticles in solution.

The synergistic optical, electronic, and chemical properties of metal nanoparticles present in close proximity have potential applications in energy, medicine, and sustainability. Fundamental studies and application development based on spontaneous self-assembly of one-dimensional (1D) chains of metal nanoparticles without external organization agencies have been pursued for over four decades. The spontaneous formation of 1D chains in a solution of stabilized spherical nanoparticles may be driven by the emergence of local anisotropy due to dipolar interaction, representing a trapped non-equilibrium state.

Delayed primary arterial switch for a rare and unusual variant of transposition of great arteries with posterior aorta.

Though initially described in 1971 by Van Praagh, transposition of great arteries with posterior aorta is rarely reported in last two decades. Since the arrangement of great arteries appears like normally related great arteries, a careful echocardiographic evaluation is necessary in patients with clinical features of transposition of great arteries. In majority of cases with this anatomy, arterial switch operation can be performed without the need of Le Compte manoeuvre.

Role of Digital Subtraction Angiography in the Preoperative Assessment of a Patient with a Petrosquamous Sinus: a Case Report.

We report a case of a 15-year-old Indian girl who presented with tinnitus, pain and ear discharge for one month and was preliminarily diagnosed with Chronic Suppurative Otitis Media (CSOM) with mastoiditis. She underwent a routine presurgical CT scan which revealed an aberrant vein, making it essential to exercise caution during surgery for CSOM. The aberrant vessel was identified as a Petrosquamous Sinus.

Fusiform "True" Posterior Communicating Artery Aneurysm with Basilar Artery Occlusion: A Case Report.

Isolated posterior communicating artery (PCoA) aneurysms are rare, predominantly fusiform in morphology, and rarely present with subarachnoid hemorrhage. Endovascular management of this pathology is technically challenging due to extreme tortuosity, the artery course in the subarachnoid space, sharp angulations at PCoA junctions with the parent artery, and, at times, associations with either internal carotid artery or basilar artery occlusions. We present a case of a ruptured fusiform PCoA at the junction of middle and distal third with concomitant proximal basilar artery occlusion.

Radiological findings and endovascular management of internal carotid artery pseudoaneurysm in the setting of mucormycosis and COVID-19.

The coronavirus pandemic is now a public health emergency and has spread to nearly 206 countries across the globe. This novel disease has shaken the psycho-social, economic, and medical infrastructure of India. This has become even more challenging, considering the country's huge population.