摘要:
An onion-like graphite 2 is produced by irradiating an electron beam to impinge upon an amorphous carbon 3 under an active aluminium nanoparticle 1. By further irradiating the electron beam upon the onion-like graphite 2 to intercalate aluminium atoms which are a constituent of the aluminium nanoparticle 1 within a space between the (001) plane and the (002) plane of the onion-like graphite 2 having a layer structure, an intercalation compound 4 is produced. Alternatively, after the aluminium nanoparticles have been disposed on the onion-like graphite and impinged thereupon by an electron beam by further irradiating the electron beam to intercalate aluminium atoms in the space between the (001) plane and the (002) plane of the onion-like graphite having a layer structure, the intercalation compounds can be produced.
摘要:
Dispose a fine metal particle (2) on a semiconductor substrate (1). By heat-treating this in a vacuum, a constituent element of the semiconductor substrate is dissolved into the fine metal particle to form a solid solution (3), resulting in further formation of a homogeneous liquid phase (liquid droplet) composed of semiconductor-metal. By annealing this, the constituent element of the semiconductor substrate is precipitated from the semiconductor-metal liquid droplet. Thus, a fine projection composite structure comprising a semiconductor substrate, a semiconductor fine projection (4) epitaxially grown selectively at an arbitrary position on the semiconductor substrate, and a metal layer (2') disposed selectively on the semiconductor fine projection, can be obtained. The metal layer (2') can be removed as demands arise. Such a fine projection composite structure possesses applicability in, for instance, an ultra-high integration semiconductor device or a quantum size device.
摘要:
An electron beam of more than 1 x 10 19 e/cm 2 .sec is irradiated upon metastable metal oxide particles such as Θ-Al 2 O 3 particles 1 disposed on an amorphous carbon film. A phase transformation of the metastable metal oxide particles results from the electron beam irradiation. Thus, stable metal oxide ultrafine particles such as α-Al 2 O 3 ultrafine particles 2 whose diameter is smaller than the metastable metal oxide particles used, can be produced. Metal nanoparticles of a metal component of the oxide such as of aluminium may also be produced.
摘要:
An electron beam of more than 1 x 10 19 e/cm 2 .sec is irradiated upon metastable metal oxide particles such as Θ-Al 2 O 3 particles 1 disposed on an amorphous carbon film. A phase transformation of the metastable metal oxide particles results from the electron beam irradiation. Thus, stable metal oxide ultrafine particles such as α-Al 2 O 3 ultrafine particles 2 whose diameter is smaller than the metastable metal oxide particles used, can be produced. Metal nanoparticles of a metal component of the oxide such as of aluminium may also be produced.
摘要翻译:将大于1×10 19 e / cm 2·sec的电子束照射在设置在无定形碳膜上的诸如THETA-Al2O3颗粒1的亚稳金属氧化物颗粒上。 亚稳态金属氧化物颗粒的相变是由电子束照射引起的。 因此,可以制备稳定的金属氧化物超细颗粒,例如其直径小于所使用的亚稳态金属氧化物颗粒的α-Al2O3超细颗粒2。 还可以生产诸如铝的氧化物的金属组分的金属纳米颗粒。
摘要:
After an ultrafine particle is disposed on a giant fullerene by driving the ultrafine particle 1 using an electron beam, the ultrafine particle is enclosed in a hollow core portion of the giant fullerene, by contracting the giant fullerene using e.g. electron beam irradiation. A metal ultrafine particle composed of an active metal can be enclosed in the hollow core portion of the giant fullerene, by irradiating, a high energy beam such as an electron beam upon an amorphous carbon substrate in the presence of the active metal to form the giant fullerene in an irradiated portion thereof, and by contracting the giant fullerene using high energy beam irradiation such as electron beam irradiation.
摘要:
Dispose a fine metal particle on a semiconductor substrate. By heat-treating this in a vacuum, a constituent element of the semiconductor substrate is dissolved into the fine metal particle to form a solid solution, resulting in further formation of a homogeneous liquid phase (liquid droplet) composed of semiconductor-metal. By annealing this, the constituent element of the semiconductor substrate is precipitated from the semiconductor-metal liquid droplet. Thus, a fine projection composite structure comprising a semiconductor substrate, a semiconductor fine projection epitaxially grown selectively at an arbitrary position on the semiconductor substrate, and a metal layer disposed selectively on the semiconductor fine projection, can be obtained. The metal layer can be removed as demands arise. Such a fine projection composite structure possesses applicability in, for instance, an ultra-high integration semiconductor device or a quantum size device.
摘要:
Ultrafine particle structure composed of a plurality of ultrafine particles disposed continuously on a substrate forming a desired shape. A plurality of the ultrafine particles consist of ultrafine particles of metal, semiconductor, compound, and the like. The ultrafine particles constituting an ultrafine particle structure are produced by disposing a target material having a slit of desired shape on a substrate and irradiating a high energy beam in a slanting direction to an inner wall surface of the target material. Constituent atoms or molecules liberated from the target material by irradiation of a high energy beam in a slanting direction are disposed continuously as a plurality of ultrafine particles on the substrate. By contacting or at least partially bonding between adjacent ultrafine particles, ultrafine particle structure is formed. Such an ultrafine particle structure contributes greatly to realization of ultrafine wirings, ultrafine devices, ultrafine functional materials, and the like which utilize the ultrafine particles.
摘要:
A fullerene composite (1) comprises a matrix formed of ultrafine fullerene (2) such as, for example, C₆₀ crystallite having diameters in the range of from 5 to 50 nm and a reinforcing member formed of a mixture consisting of carbon nanotubes (3), carbon nanocapsules (4), and inevitable indeterminate carbonaceous impurities and incorporated in the matrix. The amount of the reinforcing member incorporated in the matrix is in the range of from 15 to 45% by weight based on the amount of the matrix. Owing to the use of the reinforcing member which contains carbon nanotubes and carbon nanocapsules, the produced fullerene composite can have improved mechanical strength and resistance to deformation, to widen potential industrial applications of fullerenes.
摘要:
An ultrafine Al particle consists of an Al multiply twinned particle. The Al multiply twinned particle has a decahedron structure surrounded by ä111ü planes. The Al multiply twinned decahedral partucle has a diameter of 10 to 30 nm. Such an ultrafine Al particle consisting of the Al multiply twinned decahedral particle is obtained as follows. A metastable Al oxide particle is placed on an amorphous carbon substrate having the reduction effect. Then the electron beam is irradiated to the metastable Al oxide particle placed on the amorphous carbon substrate in the vacuum atmosphere. From the metastable Al oxide particle, Al atoms or Al clusters are emitted and adsorbed to the substrate. By adjusting the electron beam intensity so that the ultrafine Al particle in the above procedure has a diameter from 10 to 30 nm, the Al multiply twinned particle having a decahedron is obtained.