Size Control in the Colloidal Synthesis of Plasmonic Magnesium Nanoparticles.
Size Control in the Colloidal Synthesis of Plasmonic Magnesium Nanoparticles.
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DOI：
10.1021/acs.jpcc.1c07544
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发表时间：
2022-01-13
期刊：
影响因子：
--
通讯作者：
Ringe E
中科院分区：
文献类型：
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作者：
Hopper ER;Wayman TMR;Asselin J;Pinho B;Boukouvala C;Torrente-Murciano L;Ringe E
等离子体材料的纳米颗粒可以维持其自由电子密度的振荡，称为局部表面等离子体共振（LSPR），使其具有广泛的潜在应用。镁是地球上丰富的等离子体材料，由于其能够在紫外线、可见光和近红外波长范围内维持LSPR而引起越来越多的关注。调整等离子体纳米粒子的LSPR频率需要精确控制它们的尺寸和形状;对于Mg，这种控制以前已经使用自上而下的制造或气相方法实现，但这些方法缓慢且昂贵。在这里，我们系统地探讨了反应参数对镁纳米粒子的成核和生长的影响，使用一种简便和廉价的胶体合成。使用1 min的低反应时间合成了80 nm的小NPs，并且通过降低总反应浓度、用联苯替代萘电子载体或使用FeCl 3或NiCl 2的金属盐添加剂在17 h的较长反应时间下合成了100 nm的NPs。通过总反应浓度或使用具有不同还原电位的其他金属盐添加剂进一步选择高达400 nm的中间尺寸。通过降低反应温度，从而降低成核速率，产生了超过1微米的显著更大的颗粒。我们表明，增加溶剂配位减少Mg NP尺寸，而按比例放大反应降低了混合效率并产生更大的NP。令人惊讶的是，改变Mg前体和电子载体的相对量对最终NP尺寸几乎没有影响。这些结果为大规模使用Mg作为低成本和可持续的等离子体材料铺平了道路。
Nanoparticles of plasmonic materials can sustain oscillations of their free electron density, called localized surface plasmon resonances (LSPRs), giving them a broad range of potential applications. Mg is an earth-abundant plasmonic material attracting growing attention owing to its ability to sustain LSPRs across the ultraviolet, visible, and near-infrared wavelength range. Tuning the LSPR frequency of plasmonic nanoparticles requires precise control over their size and shape; for Mg, this control has previously been achieved using top-down fabrication or gas-phase methods, but these are slow and expensive. Here, we systematically probe the effects of reaction parameters on the nucleation and growth of Mg nanoparticles using a facile and inexpensive colloidal synthesis. Small NPs of 80 nm were synthesized using a low reaction time of 1 min and ∼100 nm NPs were synthesized by decreasing the overall reaction concentration, replacing the naphthalene electron carrier with biphenyl or using metal salt additives of FeCl3 or NiCl2 at longer reaction times of 17 h. Intermediate sizes up to 400 nm were further selected via the overall reaction concentration or using other metal salt additives with different reduction potentials. Significantly larger particles of over a micrometer were produced by reducing the reaction temperature and, thus, the nucleation rate. We showed that increasing the solvent coordination reduced Mg NP sizes, while scaling up the reaction reduced the mixing efficiency and produced larger NPs. Surprisingly, varying the relative amounts of Mg precursor and electron carrier had little impact on the final NP sizes. These results pave the way for the large-scale use of Mg as a low-cost and sustainable plasmonic material.
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影响因子：
13.6
作者：
Li J;Kamin S;Zheng G;Neubrech F;Zhang S;Liu N
通讯作者：
Liu N
DOI：
10.1364/josaa.11.001491
发表时间：
1994-04-01
影响因子：
1.9
作者：
DRAINE, BT;FLATAU, PJ
通讯作者：
FLATAU, PJ
影响因子：
5.3
作者：
Balakrishnan, G.;Velavan, R.;Raslan, Emad H.
通讯作者：
Raslan, Emad H.
影响因子：
10.8
作者：
Biggins, John S.;Yazdi, Sadegh;Ringe, Emilie
通讯作者：
Ringe, Emilie
影响因子：
4.7
作者：
通讯作者：
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