Apparatus and method for converting energy

• US 7,936,112 B2
• Filed: 02/17/2009
• Issued: 05/03/2011
• Est. Priority Date: 09/17/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Jongmin, Lee, Sang Yoon, Choi, Jaeyoung
• Primary Examiner(s): Dougherty; Thomas M
• Application Number:
  US12/372,369
• Publication Number:
  US 20100066208A1
• Time in Patent Office: 805 Days
• Field of Search: 310/339
• US Class Current: 310/339
• CPC Class Codes: B81B 2201/038 Microengines and actuators not provided for in B81B2201/031 - B81B2201/037
• CPC Class Codes: B81B 2203/0376 rounded profile
• CPC Class Codes: B81C 1/00103 Structures having a predefined profile, e.g. sloped or rounded grooves
• CPC Class Codes: B81C 2201/0115 Porous silicon
• CPC Class Codes: H02N 2/18 producing electrical output from mechanical input, e.g. generators for measurement devices G01
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

Exemplary embodiments relate to an energy converting apparatus and a method for converting energy, which may convert energy of an applied signal into electrical energy. The energy converting apparatus may include at least one nanowire which resonates in response to the applied signal. The resonating nanowire may contact an electrode allowing a current to flow through the electrode and the nanowire by a Schottky contact between the electrode and the nanowire. The method for converting energy may include applying a signal to at least one nanowire to resonate the nanowire, and generating electrical energy through the contact between the resonating nanowire and an electrode.

Claims

1. An energy converting apparatus comprising:

first and second electrodes spaced apart from each other; and

a first nanowire formed on the first electrode, which is composed of a piezoelectric material, the first nanowire being configured to resonate in response to an electromagnetic wave at a first frequency so as to contact the second electrode.

2. The energy converting apparatus according to claim 1,

wherein the second electrode has irregularities, and

wherein the first nanowire is positioned adjacent to concave portions of the irregularities.

3. The energy converting apparatus according to claim 2, wherein the irregularities have a curved or inclined surface.

4. The energy converting apparatus according to claim 1 further comprising:

a storage unit connected between the first and second electrodes and stores electrical energy.

5. The energy converting apparatus according to claim 4, wherein the storage unit comprises a chargeable battery or a capacitor.

6. The energy converting apparatus according to claim 1, further comprising a second nanowire formed on the first electrode, the second nanowire configured to resonate in response to an electromagnetic wave at a second frequency so as to contact the second electrode, the second frequency being different than the first frequency.

7. The energy converting apparatus according to claim 6, wherein the first nanowires and the second nanowire are formed of different materials from one another.

8. The energy converting apparatus according to claim 6, wherein the first nanowire has a first length, and the second nanowire has a second length different than the first length.

9. The energy converting apparatus according to claim 6, wherein the first nanowire has a first diameter, and the second nanowire has a second diameter different than the first diameter.

10. The energy converting apparatus according to claim 1, wherein the first nanowire is formed from at least one of zinc oxide, lead zirconate titanate, and barium titanate.

11. The energy converting apparatus according to claim 1, wherein the electromagnetic wave at the first frequency is a radio frequency wave.

12. The energy converting apparatus according to claim 1, wherein the first and second electrodes are stationary electrodes.

13. A method for converting energy comprising:

applying an electromagnetic wave at a first frequency to a first nanowire formed of a piezoelectric material to resonate the first nanowire; and

generating electric energy through the contact between the resonating first nanowire and an electrode.

14. The method for converting energy according to claim 13, further comprising:

applying an electromagnetic wave at a second frequency to a second nanowire formed of the piezoelectric material to resonate the second nanowire, the second frequency being different than the first frequency; and

generating electric energy through the contact between the resonating second nanowire and the electrode.

15. The method for converting energy according to claim 13, wherein the electromagnetic wave at the first frequency is a radio frequency wave.

16. An energy converting apparatus comprising:

first and second electrodes spaced apart from each other;

first and second nanowires formed on the first electrode, the first nanowire being configured to resonate in response to an electromagnetic wave at a first frequency so as to contact the second electrode, the second nanowire being configured to resonate in response to an electromagnetic wave at a second frequency so as to contact the second electrode; and

a storage unit connected between the first and second electrodes that stores electrical energy generated by the first and second nanowires.

17. The energy converting apparatus according to claim 16, wherein the first nanowire is formed of a first material, and the second nanowire is formed of a second material that is different than the first material.

18. The energy converting apparatus according to claim 16, wherein the first nanowire has a first length, and the second nanowire has a second length different than the first length.