奈米熱劑之高放熱熱劑反應，所產生之單位體積或單位重量的反應物所產生的反應熱都遠高於RDX或TNT等高爆藥。我們於本研究中提出一項之鋁/氧化銅奈米熱劑合成法，並探討其反應特性。合成步驟中銅網，置放於爐溫400到600°C之間的高溫爐內噴吹空氣，在恆溫2個小時空氣環境下進行熱氧化，於銅線表面生成氧化銅奈米線陣列，並利用掃描式電子顯微鏡觀察氧化後的銅線表面與斷面形貌，做為熱氧化實驗參數的篩選，氧化後的銅線斷面，由內到外分別為：未氧化的銅芯、Cu2O層、CuO層、氧化銅奈米線。鋁材選用50奈米的鋁粉粉體做為原料，以電泳沉積的方式將奈米鋁粒子沉積於氧化銅奈米線陣列的空隙之中。本研究配製3：1的乙醇/水溶液做為奈米鋁粒子之分散介質，鋁粉倒入乙醇水溶液後將液體進行2分鐘的間歇性超音波震盪，讓懸浮液中的鋁粒子能夠均勻的分散於其中。震盪後的液體被倒入電泳裝置中，施加不同電泳時間，進行鋁粉粒子的電泳沉積，而沉積厚度會隨著時間增加而變厚。
本實驗是通過施加電場將帶有正Zeta電位奈米鋁粉，沉積至負極為熱氧化法後表面長有氧化銅奈米線之銅網。氧化銅奈米線形狀、沉積基板的幾何形狀等因素，都將對奈米熱劑燃燒特性有影響。實驗中選擇銅網為100、150、200及250目。基於時間與沉積量之關係進行燃燒試驗。結果顯示線徑與線距均會影響燃燒特性，250目銅網燃速最快燃燒反應最劇烈，反之100目銅網燃速最低燃燒反應也較為不劇烈。當量比也是影響燃速關鍵因素之一，實驗中發現在空氣下當量比1.6有最高燃速約為22.3 cm/s，氬氣下當量比為1.3時有最高燃速為21.9 cm/s。

This study explores the deposition and structuring of Al/CuO nanothermite wires, along with an investigation into their reaction mechanisms. Initially, copper wires are substituted with copper mesh and subjected to thermal oxidation in a box furnace to grow copper oxide nanowires on the surface. Nanothermite synthesis is achieved through electrophoretic deposition (EPD). Structuring involves the use of copper meshes with different mesh sizes to synthesize nanothermite, followed by open-space combustion. Additionally, nanothermite is synthesized using copper meshes with 50, 100, and 500 nm aluminum powder, and layered combustion is conducted to compare their performance.In terms of combustion mechanisms, the study employs different environmental gases and burns copper mesh nanothermite with varying equivalence ratios. Microscopic observations are made to understand the combustion mechanism. Results indicate that while a mesh size of 250 demonstrates improved combustion efficiency, its structural instability leads to the selection of a 200-mesh copper mesh for focused investigation.In the combustion mechanism, it is observed that due to the higher specific heat of air compared to argon, the combustion temperature is lower, resulting in slower burning speeds at an equivalence ratio of 1.3. However, at an equivalence ratio of 1.6, excess aluminum reacts with oxygen in the air, surpassing the burning speed of argon.

[1] S.H. Fischer and M.C. Grubelich, Theoretical energy release of thermites, intermetallic, and combustible metals, 24th International Pyrotechnics Seminar, Monterey, CA, USA, July 27-31, 1998.
[2] C.L. Yeh (2016), Combustion synthesis: principles and applications, Reference Module in Materials Science and Materials Engineering 6, 121-129.
[3] E.L. Dreizin (2009), Metal-based reactive nanomaterials, Progress in Energy and Combustion Science 35(2), 141-167.
[4] D.G. Piercey and T.M. Klapotke (2010), Nanoscale aluminum - metal oxide (thermite) reactions for application in energetic materials, Central European Journal of Energetic Materials 7(2), 115-129.
[5] R.A. Yetter, G.A. Risha and S.F. Son (2009), Metal particle combustion and nanotechnology, Proceedings of the Combustion Institute 32, 1819-1838.
[6] F. Chávez, G.F. Pérez-Sánchez, O. Goiz, P. Zaca-Morán, R. Peña-Sierra, A. Morales-Acevedo, C. Felipe and M. Soledad-Priego (2013), Sensing performance of palladium-functionalized WO3 nanowires by a drop-casting method, Applied Surface Science 275, 28-35.
[7] K.T. Sullivan, J.D. Kuntz and A.E. Gash (2012), Electrophoretic deposition and mechanistic studies of nano-Al/CuO thermites, Journal of Applied Physics 112, 024316.
[8] K.T. Sullivan, M.A. Worsley, J.D. Kuntz and A.E. Gash (2012), Electrophoretic deposition of binary energetic composites, Combustion and Flame 159, 2210-2218.
[9] Y.J. Yin, F. Hu, L.H. Cheng and X.D. Wang (2023), Electrophoretic deposition of hybrid organic-inorganic PTFE/Al/CuO energetic film, Defence Technology 22, 112-118.
[10] H. Wang, G. Jian, G.C. Egan and M.R. Zachariah (2014), Assembly and reactive properties of Al/CuO based nanothermite microparticles, Combustion and Flame 161, 2203-2208.
[11] H. Wang, J.B. DeLisio, G. Jian, W. Zhou and M.R. Zachariah (2015), Electrospray formation and combustion characteristics of iodine-containing Al/CuO nanothermite microparticles, Combustion and Flame 162, 2823-2829.
[12] K. Zhang, C. Rossi, M. Petrantoni and N. Mauran (2008), A nano initiator realized by integrating Al/CuO-based nanoenergetic materials with Au/Pt/Cr microheater, Journal of Microelectromechanical Systems 17(4), 832-836.
[13] K. Zhang, C. Rossi, M. Petrantoni and N. Mauran (2008), A nano initiator realized by integrating Al/CuO-based nanoenergetic materials with Au/Pt/Cr microheater, Journal of Microelectromechanical Systems, 17(4), 832-836.
[14] V.K. Patel and S. Bhattacharya (2013), High-performance nanothermite composites based on aloe-vera-directed CuO nanorods, ACS Applied Material and Interfaces 5, 13364-13374.
[15] S. Apperson, R.V. Shende, S. Subramanian, D. Tappmeyer, S. Gangopadhyay, Z. Chen, K. Gangopadhyay, P. Redner, S. Nicholich and D. Kapoor (2007), Generation of fast propagating combustion and shock waves with copper oxide/aluminum nanothermite composites, Applied Physics Letters 91, 243109.
[16] Y. Yang, P. Wang, Z. Zhang, H. Liu, J. Zhang, J. Zhuang and X. Wang (2013), Nanowire membrane-based nanothermite: towards processable and tunable interfacial diffusion for solid state reactions, Scientific Reports 3, 1694.
[17] K.T. Sullivan and M. Zachariah (2010), Simultaneous pressure and optical measurements of nanoaluminum thermites: investigating the reaction mechanism, Journal of Propulsion and Power 26(3), 467-472.
[18] K.T. Sullivan, N.W. Piekiel, S. Chowdhury, C. Wu, M.R. Zachariah and C.E. Johnson (2011), Ignition and combustion characteristics of nanoscale Al/AglO3: a potential energetic biocidal system, Combustion Science and Technology 183, 285-302.
[19] K.C. Walter, D.R. Pesiri and D.E. Wilson (2007), Manufacturing and performance of nanometric Al/MoO3 energetic materials, Journal of Propulsion and Power 23(4), 645-650
[20] T.M. Tillotson, A.E. Gash, R.L. Simpson, L.W. Hrubesh, J.H. Satcher and J.F. Satcher (2001), Nanostructured energetic materials using sol-gel methodologies, J. Non-Cryst. Solids. 285, 338–345.
[21] D. Prentice, M.L. Prentice and B.J. Clapsaddle (2005), Effect of nanocomposite synthesis on the combustion performance of a ternary thermite, J. Phys. Chem. B. 109, 20180–20185.
[22] M. Schoenitz, T. Ward and E. Dreizin (2005), Fully dense nano-composite energetic powders prepared by arrested reactive milling, Proceedings of the Combustion Institute 30, 2071-2078.
[23] Y. Yang, D.R. Yan, Y.C. Dong, L. Wang, X.G. Chen, J.X. Zhang, J.N. He and X.Z. Li (2011), In situ nanostructured ceramic matrix composite coating prepared by reactive plasma spraying micro-sized Al-Fe2O3 composite powders. J. Alloy. Compd. 509, L90–L94.
[24] A. Ermoline, D. Stamatis and E. Dreizin (2012), Low-temperature exothermic reactions in fully dense Al-CuO nanocomposite powders, Thermochimica Acta 527, 52-58.
[25] C. Yang, Y. Hu, R.Q. Shen, Y.H. Ye, S.X. Wang and T.L. Hua (2014), Fabrication and performance characterization of Al/Ni multilayer energetic films. Appl. Phys. A. 114, 459–464.
[26] Y. Wang, X. Zhang, J. Xu, Y. Shen, C. Wang, F. Li, Z. Zhang, J. Chen, Y. Ye and R. Shen (2021), Fabrication and characterization of Al–CuO nanocomposites prepared by sol-gel method, Defence Technology 17(4), 1307-1312.
[27] E. Tichtchenko, B. Bedat, O. Simonin, L. Glavier, D. Gauchard, A. Esteve and C. Rossi (2023), Comprehending the influence of the particle size and stoichiometry on Al/CuO thermite combustion in close bomb: a theoretical study, Propellants, Explosives, Pyrotechnics 48(7), e202200334.
[28] K. Ouyang, J. Cheng, Z. Zhang, F. Li, Y. Ye and R. Shen (2023), Enhancing the combustion and propulsion performance of Al/CuO via introducing AlH3 as fuel substitute, Fuel 347(1), 128483.
[29] C.S. Staley, K.E. Raymond, R. Thiruvengadathan, S.J. Apperson, K. Gangopadhyay, S.M. Swaszek, R.J. Taylor and S. Gangopadhyay (2013), Fast-impulse nanothermite solid-propellant miniaturized thrusters, Journal of Propulsion and Power 29(6), 1400-1409.
[30] S.F. Son, B.W. Asay, T.J. Foley, R.A. Yetter, M.H. Wu and G.A. Risha (2007), Combustion of nanoscale Al/MoO3 thermite in microchannels, Journal of Propulsion and Power 23, 715–721.
[31] T. Wu, B. Julien, H. Wang, S. Pelloquin, A. Esteve, M.R. Zachariah and C. Rossi (2022), Engineered porosity-induced burn rate enhancement in dense Al/CuO nanothermites, ACS Appl. Energy Mater 5, 3189-3198.
[32] F. Saceleanu, M. Idir, N. Chaumeix and J.Z. Wen (2018), Combustion characteristics of physically mixed 40 nm aluminum/copper oxide nanothermites using laser ignition, Chemical Physics and Physical Chemistry 6, 465.
[33] M. Petrantoni, C. Rossi, V. Conedera, D. Bourrier, P. Alphonse and C. Tenailleau (2010), Synthesis process of nanowired Al/CuO thermite, Journal of Physics and Chemistry of Solids 71, 80-83.
[34] F. Séverac, P. Alphonse, A. Estève, A. Bancaud and C. Rossi (2011), High-energy Al/CuO nanocomposites obtained by DNA-directed assembly, Advanced Functional Materials 5, 1-7.
[35] K.J. Blobauma, M.E. Reiss, J.M.P. Lawrence and T.P. Weihs (2003), Deposition and characterization of a self-propagating CuOx/Al thermite reaction in a multilayer foil geometry, Journal of Applied Physics 94(5), 2915-2922.
[36] J. Zapata, A. Nicollet, B. Julien, G. Lahiner, A. Esteve and C. Rossi (2019), Self-propagating combustion of sputter-deposited Al/CuO nanolaminates, Combustion and Flame 205, 389-396.
[37] X. Ke, X. Zhou, H. Gao, G. Hao, L. Xiao, T. Chen, J. Liu and W. Jiang (2018), Surface functionalized core/shell structured CuO/Al nanothermite with long-term storage stability and steady combustion performance, Materials & Design 140(15), 179-187.
[38] A. Dolgoborodov, B. Yankovsky, S. Ananev, G. Valyano and G. Vakorina (2022), Explosive burning of a mechanically activated Al and CuO thermite mixture, Energies 15, 489.
[39] S. Kim, A. A. Johns, J.Z. Wen and S. Deng (2023), Burning structures and propagation mechanisms of nanothermites, Proceedings of the Combustion Institute 39(3), 3593-3604.
[40] Y. Mao, L. Zhong, X. Zhou, D. Zheng, X. Zhang, T. Duan, F. Nie, B. Gao and D. Wang (2019), 3D printing of micro-architected Al/CuO-based nanothermite for enhanced combustion performance, Adv. Eng. Mat. 21, 1900825.
[41] J. Gao, J. Yan, B. Zhao, Z. Zhang and Q. Yu (2020), In situ observation of temperature-dependent atomistic and mesoscale oxidation mechanisms of aluminum nanoparticles, Nano Res. 13(1), 183-187.
[42] T. Campbell, R.K. Kalia, A. Nakano, P. Vashishta, S. Ogata and S. Rodgers (1999), Dynamics of oxidation of aluminum nanoclusters using variable charge molecular-dynamics simulations on parallel computers, Phys. Rev. Lett. 82(24), 4866.
[43] P. Chakraborty and M.R. Zachariah (2014), Do nanoenergetic particles remain nano-sized during combustion, Combustion and Flame 161, 1408-1416.
[44] Y. Wang, X. Zhang, J. Xu, Y. Shen, C. Wang, F. Li, Z. Zhang, J. Chen, Y. Ye and R. Shen (2021), Fabrication and characterization of Al–CuO nanocomposites prepared by sol-gel method, Defence Technology 17(4), 1307-1312.
[45] K.T. Sullivan, N. Piekiel, C. Wu, S. Chowdhury, S. Kelly, T. Hufnagel, K. Fezzaa and M. Zachariah (2012), Reactive sintering: an important component in the combustion of nanocomposite thermites, Combustion and Flame 159, 2-15.
[46] J.M. Epps, J. Hickey and J.Z. Wen (2021), Modelling reaction propagation for Al/CuO nanothermite pellet combustion, Combustion and Flame 229, 111374.
[47] G. Xiong, C. Yang, S. Feng and W. Zhu (2020), Ab initio molecular dynamics studies on the transport mechanisms of oxygen atoms in the adiabatic reaction of Al/CuO nanothermite, Chemical Physics Letters 745, 137278.
[48] Y.C. Chiang, Assembly and the reaction characteristic of Al/CuO nanowire thermite, Master Thesis, National Cheng Kung University, Taiwan, 2016.
[49] Y.C. Chiang and M.H. Wu (2017), Assembly and reaction characterization of a novel thermite consisting aluminum nanoparticles and CuO nanowires, Proceedings of the Combustion Institute 36(3), 4201-4208.
[50] J. Wu (2022), Understanding the electric double-layer structure, cpacitance,and charging dynamics, Chem.Rev. 122(12), 10579-11168.
[51] R.Y. Li, Resolving temperature distributions of detonation waves in narrow channels using high-speed imaging thermometry, Master Thesis, National Cheng Kung University, Taiwan, 2021.
[52] C. de Izarra and J.-M. Gitton (2010), Calibration and temperature profile of a tungsten filament lamp, European Journal of Physics 31(4), 933-942.