Abstract: This disclosure discloses a method and a device for the detection of heavy metal ions in water. The method includes: providing a detection material, wherein the detection material includes a hydrophilic layer which is at least partially covered by a hydrophobic layer formed from a long-chain compound selected from the group consisting of a long-chain thiol, a long-chain fatty acid and combinations thereof, and wherein a detection area is an area covered by the hydrophobic layer, and the detection area has a surface having an initial contact angle with water of more than or equal to about 120°; contacting the detection area with an aqueous solution sample; determining whether the surface of the detection area has a hydrophobicity-hydrophilicity change after contact with the aqueous solution sample; and deciding whether heavy metal ions exist in the aqueous solution sample according to the determination.

Abstract: The invention provides a test piece for detecting heavy metal ions in an aqueous system to be detected, comprising a substrate, a polymer coating layer and a layer of heavy metal ion-detecting agent, wherein the polymer coating layer is provided such that the surface of the test piece is hydrophobic. The invention further provides a process for detecting heavy metal ions in an aqueous system, a kit comprising the heavy metal ion test piece and a sensor. A portable test piece and/or a device can be provided by the test piece according to the invention, so as to detect the heavy metal ions in a convenient, efficient and rapid manner.

Abstract: An efficient and cost-effective method for treating carbon nanotubes (CNTs) is provided. The method includes comprising: dispersing said carbon nanotubes in a dispersing medium to prepare a dispersion system; mixing said dispersion system with adsorbent so that type-specific carbon nanotubes contained in said dispersion system are absorbed onto the adsorbent, wherein the adsorbent is modified by a chemical/biological modifier so as to have different adsorption selectivity to carbon nanotubes of different types; and separating the adsorbent from the dispersion system, whereby the type-specific carbon nanotubes adsorbed onto the adsorbent is separated from the carbon nanotubes of another type enriched in the dispersion system; carbon nanotubes produced by the treatment method, and CNTs devices comprising thereof.

Abstract: This disclosure discloses a method and a device for the detection of heavy metal ions in water. The method includes: providing a detection material, wherein the detection material includes a hydrophilic layer which is at least partially covered by a hydrophobic layer formed from a long-chain compound selected from the group consisting of a long-chain thiol, a long-chain fatty acid and combinations thereof, and wherein a detection area is an area covered by the hydrophobic layer, and the detection area has a surface having an initial contact angle with water of more than or equal to about 120°; contacting the detection area with an aqueous solution sample; determining whether the surface of the detection area has a hydrophobicity-hydrophilicity change after contact with the aqueous solution sample; and deciding whether heavy metal ions exist in the aqueous solution sample according to the determination.

Abstract: Carbon nanotubes, a method for preparing the same and an element using the same are provided. The method for preparing carbon nanotubes includes synthesizing carbon nanotubes from carbon source using an arc-discharge method in the presence of catalysts and promoter, wherein the promoter contains an element capable of reducing the surface energy of carbon nanotubes. Carbon nanotubes with high purity and narrow diameter distribution can thus be prepared.

Abstract: A method for preparing carbon nanotubes for synthesizing carbon nanotubes, fabricating carbon nanotube films and electronic devices is provided. The method for preparing carbon nanotubes can repair the defects in side walls of carbon nanotubes under stable condition easily and prepare carbon nanotubes of excellent properties. The method utilizes uric acid solution or ammonia water to treat carbon nanotubes after acidifying the carbon nanotubes by refluxing with nitric acid. The treatment temperature is, for example, 25° C.˜90° C., and treatment time is at least two 2 days. Preferably, the carbon nanotubes are treated with thionyl chloride solution before being treated with uric acid solution or ammonia water.

Abstract: A method of manufacturing a tubular carbon molecule capable of regularly aligning a carbon nanotube with a finer spacing is provided. A catalyst is arranged on a material substrate (10) made of a semiconductor such as silicon (Si) and including iron (Fe) as a catalyst through the use of melting according to a modulated heat distribution (11). The heat distribution (11) is formed, for example, through diffracting an energy beam (12) by a diffraction grating (13). As a method of arranging the catalyst, for example, iron may be deposited in a planar shape or a projection shape in a position corresponding to the heat distribution (11), or the deposited iron may be used as a master to be transferred to another substrate. A carbon nanotube is grown through the use of the arranged catalyst. The grown carbon nanotube can be used as a recording apparatus, a field electron emission device, an FED or the like.

Abstract: A method for treating carbon nanotubes is provided. In the method for treating carbon nanotubes (CNTs), the CNTs are treated with SO3 gas at an elevated temperature, for example, at a temperature in the range of 385° C. to 475° C.

Abstract: A method of manufacturing a tubular carbon molecule capable of regularly aligning a carbon nanotube with a finer spacing is provided. A catalyst is arranged on a material substrate (10) made of a semiconductor such as silicon (Si) and including iron (Fe) as a catalyst through the use of melting according to a modulated heat distribution (11). The heat distribution (11) is formed, for example, through diffracting an energy beam (12) by a diffraction grating (13). As a method of arranging the catalyst, for example, iron may be deposited in a planar shape or a projection shape in a position corresponding to the heat distribution (11), or the deposited iron may be used as a master to be transferred to another substrate. A carbon nanotube is grown through the use of the arranged catalyst. The grown carbon nanotube can be used as a recording apparatus, a field electron emission device, an FED or the like.

Abstract: A process of a preparing transparent conductive carbon nanotube (CNT) film, the carbon nanotube film prepared by the process, and carbon nanotube elements including the carbon nanotube film are provided. The carbon nanotube film has a higher transparency and much lower sheet resistance compared with the carbon nanotube film obtained by a conventional filtration process.

Abstract: A single-wall carbon nanotube heterojunction is provided. In the single-wall carbon nanotube, a semiconductive single-wall carbon nanotube and a metallic single-wall carbon nanotube are joined with each other in a longitudinal direction thereof.

Abstract: A method of preparing carbon nanotubes (CNT), a method of purifying carbon nanotubes, carbon nanotubes, and an element using said carbon nanotubes are provided. The method includes preparing carbon nanotubes by arc-discharge and employs a coordination chemistry process to remove a catalyst and/or optional promoter used in arc-discharge.

Abstract: Carbon nanotubes, a method for preparing the same and an element using the same are provided. The method for preparing carbon nanotubes includes synthesizing carbon nanotubes from carbon source using an arc-discharge method in the presence of catalysts and promoter, wherein the promoter contains an element capable of reducing the surface energy of carbon nanotubes. Carbon nanotubes with high purity and narrow diameter distribution can thus be prepared.

Abstract: An efficient and cost-effective method for treating carbon nanotubes (CNTs) is provided. The method includes comprising: dispersing said carbon nanotubes in a dispersing medium to prepare a dispersion system; mixing said dispersion system with adsorbent so that type-specific carbon nanotubes contained in said dispersion system are absorbed onto the adsorbent, wherein the adsorbent is modified by a chemical/biological modifier so as to have different adsorption selectivity to carbon nanotubes of different types; and separating the adsorbent from the dispersion system, whereby the type-specific carbon nanotubes adsorbed onto the adsorbent is separated from the carbon nanotubes of another type enriched in the dispersion system; carbon nanotubes produced by the treatment method, and CNTs devices comprising thereof.

Abstract: Methods for preparing flexible transparent conducting carbon nanotube (CNT) films, the CNT film prepared from said methods, a method of treating CNT film by using thionyl bromide (SOBr2) as a dopant are provided. A novel CNT film laminate with a sandwich structure are also provided, a transparent, flexible anode including the CNT film and an organic light-emitting diodes (LEDs) including the anode are also provided. The method of the present application can very quickly and completely remove the filter membrane, compared with a general immersion method. CNTs are not destroyed by the “soft method”, which will allow for expanded applications in electroluminescent or photovoltaic devices.

Abstract: A method for treating carbon nanotubes is proved, which comprises treating the carbon nanotubes with an aqueous solution containing hydroxyl radicals (HO.).

Abstract: A method for treating carbon nanotubes is provided. In the method for treating carbon nanotubes (CNTs), the CNTs are treated with SO3 gas at an elevated temperature, for example, at a temperature in the range of 385° C. to 475° C.

Abstract: A method of manufacturing a tubular carbon molecule capable of regularly aligning a carbon nanotube with a finer spacing is provided. A catalyst is arranged on a material substrate (10) made of a semiconductor such as silicon (Si) and including iron (Fe) as a catalyst through the use of melting according to a modulated heat distribution (11). The heat distribution (11) is formed, for example, through diffracting an energy beam (12) by a diffraction grating (13). As a method of arranging the catalyst, for example, iron may be deposited in a planar shape or a projection shape in a position corresponding to the heat distribution (11), or the deposited iron may be used as a master to be transferred to another substrate. A carbon nanotube is grown through the use of the arranged catalyst. The grown carbon nanotube can be used as a recording apparatus, a field electron emission device, an FED or the like.

Abstract: A method of manufacturing a fine structure capable of accurately controlling formation positions of tubular structures made of carbon or the like is provided. Column-shaped protrusions (11) are formed on a substrate (10). Next, a catalyst material (20) such as iron (Fe) is adhered to the substrate (10). Subsequently, by providing the substrate (10) with heat treatment, the catalyst material (20) is melted and agglomerated on the side faces (11A) of the protrusions (11), and thereby cyclic catalyst patterns made of the catalyst material (20) are formed on the side faces (11A) of the protrusions (11). After that, tubular structures (30) in a state of tube are grown by using the catalyst patterns. The tubular structures (30) become carbon (nano) pipes, which are raised from the side faces (11A) of the protrusions (11) and whose ends (30A) are opened. The tubular structures (30) can be formed correspondingly to the positions of the protrusions (11) accurately.

Abstract: A manufacturing method of carbon nanotubes capable of mass-producing DWCNT with high throughput and a low defect incidence ratio is provided. In a vacuum chamber (1), a first electrode (2) having a hollow (2a) and a rod-like second electrode (3) are included. Inert gas such as helium gas, nitrogen gas, and argon gas is introduced into the vacuum chamber (1), the atmosphere not containing hydrogen gas and oxygen gas is created, and in this state, arc discharge is generated between the first electrode (2) and the second electrode (3). The heat generated by arc discharge is moderately stored on the surface of the inner side surrounded by the first electrode (2), and temperatures on the surface of the first electrode (2) are maintained at the temperatures suitable for producing the DWCNT (8). Thereby, the thready DWCNT (8) can be continuously produced without pause starting with a catalyst (6).