TERMIUM Plus®

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nanoshell [2 records]

Record 1 2016-02-18

English

Subject field(s)
  • Atomic Physics
  • Cancers and Oncology
DEF

A nanoparticle composed of a [gold] metallic shell surrounding a semiconductor.

OBS

When nanoshells reach a target cancer cell, they can be irradiated with near-infrared light or excited with a magnetic field, either of which will cause the nanoshell to become hot, killing the cancer cell.

CONT

This chemical sensing technique relies on nanoparticles consisting of gold and silica called nanoshells, invented 10 years ago at Rice by nanophotonics pioneer Naomi Halas. Nanoshells are about 20 times smaller than a red blood cell, and they can amplify light waves and focus them so tightly that scientists can use them to detect just a few molecules of a target chemical. Building catalysts directly on the surface of the nanoparticles themselves allows researchers to use the nanosensing capabilities of nanoshells to directly follow chemical reactions on the catalyst using light.

Key term(s)
  • gold nano-shell
  • gold nano shell
  • nano-shell
  • nano shell
  • gold-silica nano-shell
  • gold-silica nano shell
  • gold silica nanoshell
  • gold silica nano-shell
  • gold silica nano shell
  • gold/silica nano-shell
  • gold/silica nano shell
  • silica-gold nano-shell
  • silica-gold nano shell
  • silica/gold nano-shell
  • silica/gold nano shell
  • silica gold nanoshell
  • silica gold nano-shell
  • silica gold nano shell

French

Domaine(s)
  • Physique atomique
  • Cancers et oncologie
DEF

Particule sphérique constituée d'un noyau de silicium enrobé d'or, qui dégage de la chaleur lorsqu'elle est pénétrée par un rayon infrarouge ou un rayon X.

OBS

Cette nanobille est utilisée en médecine pour le traitement du cancer. Elle peut tuer une tumeur lorsqu'elle est accrochée à celle-ci.

PHR

Chaque «hairpin» est fonctionnalisé par une nanobille d'or.

Spanish

Campo(s) temático(s)
  • Física atómica
  • Tipos de cáncer y oncología
Save record 1

Record 2 2011-12-14

English

Subject field(s)
  • Non-Surgical Treatment
  • Atomic Physics
CONT

A nanoshell is a type of spherical nanoparticle consisting of a dielectric core which is covered by a thin metallic shell (usually gold).

CONT

Gold nanoshells are shuttled into tumors by the use of phagocytosis where phagocytes engulf the nanoshells through the cell membrane to form an internal phagosome, or macrophage. After this it is shuttled into a cell and enzymes are usually used to metabolize it and shuttle it back out of the cell. These nanoshells are not metabolized so for them to be effective they just need to be within the tumor cells and photoinduced cell death is used to terminate the tumor cells.

Key term(s)
  • nano shell
  • nano-shell

French

Domaine(s)
  • Traitements non chirurgicaux
  • Physique atomique
CONT

[...] certaines nanoparticules d'or (en fait ici des nanocoquilles) réagissent uniquement à la lumière dans le proche infrarouge, fréquence à laquelle les tissus sont transparents. La méthode de traitement du cancer est la suivante : on injecte des nanocoquilles dans les tumeurs, puis on irradie les tumeurs avec du proche infrarouge. Les nanoparticules se mettent alors à chauffer et «cuisent» littéralement les cellules environnantes. [...] Plus on va dans le rouge, plus les cellules chauffent. On arrose les tumeurs en infrarouge [...]

Key term(s)
  • nano coquille
  • nano-coquille

Spanish

Campo(s) temático(s)
  • Tratamiento sin cirugía
  • Física atómica
CONT

Nanoesfera: nanopartícula estructurada en forma de matriz en la que el fármaco aparece distribuido de forma dispersa.

Save record 2

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