Porous substrates, articles, systems and compositions comprising nanofibers and methods of their use and production

• US 20110039690A1
• Filed: 08/29/2006
• Published: 02/17/2011
• Est. Priority Date: 02/02/2004
• Status: Abandoned Application

• Current Assignee: ONED Material Incorporated
• Original Assignee: Nanosys Incorporated (Shoei Electronic Materials, Inc.)
• Inventors: Niu, Chunming
• Application Number:
  US11/511,886
• Publication Number:
  US 20110039690A1
• Time in Patent Office: Days
• US Class Current: 502/184
• CPC Class Codes: B01D 2239/0208 Single-component fibres
• CPC Class Codes: B01D 2239/0216 Bicomponent or multicomponent fibres
• CPC Class Codes: B01D 2239/025 comprising nanofibres apparatus incorporating such gas filtering material see B01D46/546
• CPC Class Codes: B01D 2239/0407 comprising particulate additives, e.g. adsorbents apparatus incorporating gas filtering material B01D46/0036
• CPC Class Codes: B01D 2239/0421 Rendering the filter material hydrophilic
• CPC Class Codes: B01D 2239/0428 Rendering the filter material hydrophobic
• CPC Class Codes: B01D 2239/0492 on fibres
• CPC Class Codes: B01D 2239/064 The fibres being mixed
• CPC Class Codes: B01D 2239/065 More than one layer present in the filtering material apparatus incorporating such gas filtering material B01D2275/10
• CPC Class Codes: B01D 2239/0654 Support layers
• CPC Class Codes: B01D 2239/10 Filtering material manufacturing
• CPC Class Codes: B01D 2239/1216 Pore size
• CPC Class Codes: B01D 2239/1225 Fibre length
• CPC Class Codes: B01D 39/083 of organic material
• CPC Class Codes: B01D 39/086 of inorganic material
• CPC Class Codes: B01D 39/2065 the material being fibrous
• CPC Class Codes: B01J 21/18 Carbon
• CPC Class Codes: B01J 23/42 Platinum
• CPC Class Codes: B01J 23/52 Gold
• CPC Class Codes: B01J 35/23 in a colloidal state
• CPC Class Codes: B01J 35/50 : characterised by their shape or configuration
• CPC Class Codes: B01J 37/0221 : of particles
• CPC Class Codes: B82Y 30/00 : Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: D06M 11/44 : Oxides or hydroxides of elements of Groups 2 or 12 of the Periodic Table; Zincates; Cadmates
• CPC Class Codes: D06M 11/45 : Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates
• CPC Class Codes: D06M 11/46 : Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
• CPC Class Codes: D06M 11/49 : Oxides or hydroxides of elements of Groups 8, 9,10 or 18 of the Periodic Table; Ferrates; Cobaltates; Nickelates; Ruthenates; Osmates; Rhodates; Iridates; Palladates; Platinates
• CPC Class Codes: D06M 11/83 : with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
• CPC Class Codes: G01N 30/52 : Physical parameters
• CPC Class Codes: H01B 1/00 : Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
• CPC Class Codes: H01B 1/04 : mainly consisting of carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01L 21/02164 : the material being a silicon oxide, e.g. SiO2
• CPC Class Codes: H01L 21/0237 : Materials
• CPC Class Codes: H01L 21/02524 : Group 14 semiconducting materials
• CPC Class Codes: H01L 21/02532 : Silicon, silicon germanium, germanium
• CPC Class Codes: H01L 21/02538 : Group 13/15 materials
• CPC Class Codes: H01L 21/02551 : Group 12/16 materials
• CPC Class Codes: H01L 21/02603 : Nanowires
• CPC Class Codes: H01L 21/02606 : Nanotubes carbon nanotubes H10K85/211
• CPC Class Codes: H01L 21/0262 : Reduction or decomposition of gaseous compounds, e.g. CVD
• CPC Class Codes: H01L 21/02639 : Preparation of substrate for selective deposition
• CPC Class Codes: H01L 21/02645 : Seed materials
• CPC Class Codes: H01L 21/02653 : Vapour-liquid-solid growth
• CPC Class Codes: H01L 21/02664 : Aftertreatments planarisation in general H01L21/304
• CPC Class Codes: Y10T 428/2991 : Coated

Abstract

Porous and/or curved nanofiber bearing substrate materials are provided having enhanced surface area for a variety of applications including as electrical substrates, semipermeable membranes and barriers, structural lattices for tissue culturing and for composite materials, production of long unbranched nanofibers, and the like. A method of producing nanofibers is disclosed including providing a plurality of microparticles or nanoparticles such as carbon black particles having a catalyst material deposited thereon, and synthesizing a plurality of nanofibers from the catalyst material on the microparticles or nanoparticles. Compositions including carbon black particles having nanowires deposited thereon are further disclosed.

Claims

1. A method of producing nanofibers, the method comprising:

providing a plurality of microparticles or nanoparticles having a catalyst material deposited thereon; and

synthesizing a plurality of nanofibers from the catalyst material on the microparticles or nanoparticles.

2. The method of claim 1, wherein the nanofibers comprise nanowires.

3. The method of claim 2, wherein synthesizing the plurality of nanowires comprises:

depositing a gold colloid on at least a portion of the overall surface area of the microparticles or nanoparticles; and

growing the nanowires from the gold colloid with a VLS synthesis technique.

4. The method of claim 1, wherein the microparticles or nanoparticles comprise carbon black particles.

5. The method of claim 1, wherein the microparticles or nanoparticles comprise glass or quartz microspheres.

6. The method of claim 1, wherein the plurality of nanofibers comprises a semiconductor material selected from group IV, group II-VI and group III-V semiconductors.

7. The method of claim 1, wherein the plurality of nanofibers are comprised of silicon or silicon oxide.

8-10. -10. (canceled)

11. A composition comprising:

a population of substrates, wherein the substrates each comprise a carbon particle; and

a population of nanowires deposited each individual carbon particle substrate.

12. The composition of claim 11, wherein the composition is conductive.

13. The composition of claim 11, wherein the nanowires are comprised of silicon or silicon oxide.

14. The composition of claim 11, wherein the substrates are porous.

15. The composition of claim 11, further comprising one or more catalyst particles deposited on the carbon particle substrates.

16. The composition of claim 15, wherein the one or more catalyst particles comprise metal.

17. The composition of claim 16, wherein the metal comprises gold or platinum.

18. The composition of claim 11, wherein the carbon particles are suspended in a colloidal solution.

19. The composition of claim 11, wherein the carbon particles are spherical.

20. The composition of claim 11, wherein the carbon particles are microparticles or nanoparticles.

21. The composition of claim 11, wherein one or more surfaces of the carbon particles are curved.

22. The composition of claim 15, wherein the catalyst particles are deposited on multiple surfaces of the carbon particles.

23. The composition of claim 11, wherein the nanowires are grown in situ on the carbon particles.

24. The composition of claim 11, wherein the carbon particles comprise carbon black.