1. A method of making II-VI semiconductor nanowires, comprising:
(a) providing a support;
(b) depositing a layer including metal alloy nanoparticles on the support; and
(c) heating the support and growing II-VI semiconductor nanowires where the metal alloy nanoparticles act as catalysts and selectively cause localized growth of the nanowires.
2. The method of claim 1 wherein the support is selected to withstand II-VI metal-organic vapor phase epitaxy growth temperatures.
3. The method of claim 1 wherein the support includes glass, semiconductor substrates, metal foils, or high temperature plastics.
4. The method of claim 1 further including depositing a low energy surface film on the support.
5. The method of claim 4 wherein the low energy surface film includes silicon oxide or aluminum oxide.
6. The method of claim 1 wherein the metal alloy is gold-tin.
7. The method of claim 1 wherein step b includes thermal evaporation or sputtering of the metal alloy.
8. The method of claim 6 wherein the volume ratio of gold to tin ranges from 1:5 to 5:1.
9. The method of claim 1 wherein the support is heated between 260\xb0 C. and 350\xb0 C.
10. The method of claim 1 wherein step (c) takes place at a pressure between 50 torr and 760 torr.
11. The method of claim 1 wherein the diameter of each nanowire is less than 500 nanometers.
12. The method of claim 11 wherein the diameter of each nanowire is less than 100 nanometers.
13. The method of claim 1 wherein the length of each nanowire is greater than 500 nanometers
14. The method of claim 13 wherein the length of each nanowire is greater than 2 microns.
15. The method of claim 1 wherein step c further includes forming each nanowire to include one or more discrete heterostructure units whose II-VI material composition is either uniform or varies over its length.
16. The method of claim 15 wherein the length of the discrete heterostructure unit is less than 10 nm.
17. The method of claim 1 wherein a dopant is provided in step c which modifies the conductivity of the nanowires.
18. The method of claim 17 wherein the dopants are n-type and are selected from Al, In, Ga, Cl, Br or I.
19. The method of claim 17 wherein the dopants are p-type and are selected from N, P, As, Li, Cu, or LiN.
20. A method of making II-VI semiconductor nanowires, comprising:
(a) providing a support;
(b) depositing a layer including metal alloy nanoparticles on the support; and
(c) heating the support and flowing II-VI semiconductor precursors to selectively provide localized growth of II-VI semiconductor nanowires wherein the metal alloy nanoparticles act as catalysts.
21. The method of claim 20 wherein the support is selected to withstand II-VI metal-organic vapor phase epitaxy growth temperatures.
22. The method of claim 21 wherein the support includes glass, semiconductor substrates, metal foils, or high temperature plastics.
23. The method of claim 20 further including depositing a low energy surface film on the support.
24. The method of claim 23 wherein the low energy surface film includes silicon oxide or aluminum oxide.
25. The method of claim 20 wherein the metal alloy is gold-tin.
26. The method of claim 25 wherein step (b) includes thermal evaporation or sputtering of gold and tin.
27. The method of claim 25 wherein the volume ratio of gold to tin ranges from 1:5 to 5:1.
28. The method of claim 20 wherein the II-VI semiconductor precursors include diethylzinc, dimethyl cadmium, tert-butyl selenide, tert-butyl sulfide, di-isopropyl telluride, or bis(methyl-\u03b75-cyclopentadienyl)magnesium.
29. The method of claim 20 wherein the support is heated between 260\xb0 C. and 350\xb0 C.
30. The method of claim 20 wherein step (c) takes place at a pressure between 50 torr and 760 torr.
31. The method of claim 20 wherein step (c) the molar ratio of column VI precursor to column II precursor is in a range from 1:1 to 4:1.
32. The method of claim 20 wherein step (c) further includes at least two column II precursors.
33. The method of claim 20 wherein step (c) further includes at least two column VI precursors.
34. The method of claim 20 wherein the diameter of each nanowire is less than 500 nanometers.
35. The method of claim 34 wherein the diameter of each nanowire is less than 100 nanometers.
36. The method of claim 20 wherein the length of each nanowire is greater than 500 nanometers
37. The method of claim 36 wherein the length of each nanowire is greater than 2 microns.
38. The method of claim 20 wherein step (c) further includes forming each nanowire to include one or more discrete heterostructure units whose II-VI material composition is either uniform or smoothly varying over its length.
39. The method of claim 38 includes sequentially delivering II-VI semiconductor precursors to cause these materials to deposit and grow the nanowires containing one or more discrete heterostructure units.
40. The method of claim 20 wherein a dopant is provided in step c which modifies the conductivity of the nanowires.
41. The method of claim 40 wherein the dopants are n-type and are selected from Al, In, Ga, Cl, Br or I.
42. The method of claim 40 wherein the dopants are p-type and are selected from N, P, As, Li, Cu, or LiN.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A bathroom module arrangement for a trailer; said module adapted for positioning substantially on a forward \u201cA\u201d frame part of a chassis of said trailer.
2. The module of claim 1 wherein said trailer is a caravan; said caravan comprising an enclosed living area defined by a floor, sides walls, a front wall and a rear wall, and a roof.
3. The module of claim 2 wherein said module is substantially coextensive in a vertical plane at a rearmost end of said module with said front wall of said caravan.
4. The module of claim 3 wherein side walls of said module curve inwardly and forwardly from said rearmost end to respective outer side edges of a front wall of said module; said front wall located at an intermediate position along said \u201cA\u201d frame between said rearmost end and the apex of said \u201cA\u201d frame.
5. The module of claim 4 wherein said front wall of said module extends substantially across said \u201cA\u201d frame so as to coincide in width with said \u201cA\u201d frame at said intermediate position.
6. The module of claim 4 wherein said front wall of said module extends upwardly from said \u201cA\u201d frame to a point intermediate said \u201cA\u201d frame and a plane defined by said roof of said caravan.
7. The module of claim 4 wherein upper edges of said side walls curve forwardly and downwardly from said roof of said caravan to respective upper corners of said front wall of said module.
8. The module of claim 7 wherein said module is provided with a curved roof portion extending forwardly and downwardly from a front edge of said roof of said caravan to an upper edge of said front wall of said module; and wherein side edges of said curved roof portion coincide with said upper edges of said side walls when said roof portion is in a first closed position; said side walls, said front wall and said roof portion providing an aerodynamically efficient enclosure.
9. The module of claim 8 wherein said roof portion is adapted for rotation about a hinge adjoining said front edge of said roof of said caravan, between said first closed position and a second open position.
10. The module of claim 8 wherein said roof portion assumes an upwardly and rearwardly tilted attitude when in said second open position, so as to provide a greater degree of headroom to a user of said bathroom module than headroom available in said living area.
11. The module of claim 9 wherein rotation of said roof portion from said first position to said second position is assisted by gas struts.
12. The module of claim 8 wherein impervious flexible sheeting is provided stretching between said side edges and a front edge of said roof portion, and said upper edges of said side walls and said upper edge of said front wall of said bathroom module, so as provide a weather-proof enclosure when said roof portion is in said second open position.
13. The module of claim 12 wherein said flexible sheeting stretching between said front edge of said roof portion and said upper edge of said front wall is provided with a section of transparent sheeting to provide access for natural light into said bathroom module when said roof portion is in said second open position.
14. The module of claim 12 wherein said flexible sheeting is provided with at least one insect proof ventilation aperture.
15. The module of claim 2 wherein access for a user of said module is provided by an entry door positioned substantially in the centre of said front wall of said living area of said caravan.
16. The module of claim 15 wherein said module is provided with a centrally located shower base extending substantially between said door and said front wall of said module.
17. The module of claim 16 wherein said shower base is provided with a waste water drain.
18. The module of claim 16 wherein said module is provided with a raised platform area at a first side of said shower base; said platform extending between said shower base and a vertical partition; said platform area adapted for support of a chemical toilet unit.
19. The module of claim 18 wherein a storage space is provided between said vertical partition and a first one of said side walls of said module; said storage space accessible by a hinged door provided in said first one of said side walls.
20. The module of claim 16 wherein said module is provided with a raised bench top area at a second opposite side of said shower base; said bench top area extending between said shower base and a second one of said side walls; said bench top provided with a hand basin.
21. The module of claim 20 wherein a storage space is provided beneath said raised bench top area; said storage area accessible by a hinged door provided in said second one of said side walls.
22. The module of claim 20 wherein said hand basin is provided with at least one water supply outlet and a waste water drain.
23. The module of claim 1 wherein said module is provided with a shower head adapted for connection to a pump arranged to draw water from a water container.
24. The module of claim 15 wherein said module is provided with storage recesses arranged one on each side of said entry door; said recesses accessible from said living area of said caravan through respective hinged doors mounted in said front wall of said living area.
25. The module of claim 1, in combination with a trailer; wherein said bathroom module is positioned substantially over a forward \u201cA\u201d frame section of a chassis of said trailer.