deletions | additions       diff --git a/In_the_more_recent_years__.tex b/In_the_more_recent_years__.tex  index b8ee0fc..635c910 100644  --- a/In_the_more_recent_years__.tex  +++ b/In_the_more_recent_years__.tex 
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Further developments in fine-tuning the gallium source has led to the usage of Ga/GaCl3 instead of only molten gallium. This mixture of gallium compounds has demonstrated efficacy in forming much straighter nanowires compared to only molten gallium when grown on a silicon substrate. The same team also discovered that the rate of ammonia flow into the chamber enhances the reaction of gallium and nitrogen as well as the lateral growth rate. \cite{Ren_2014}  In 2014, a method to control the alignment of GaN nanowires grown via VLS was reported by the Kuykendall group. They utilized similar growth conditions as previously described, using trimethylgallium and ammonia as the feed gases, and nitrogen as the carrier gas. However, their unique gold-nickel bimetallic catalyst controlled the growth direction of the nanowires. By changing the molar ratio of the gold to nickel within the catalyst, they were able to select growth along different axes. It is was  observed that using more gold tilted the nanowires relative to the substrate, while using more nickel kept the nanowire growth perpendicular. The group was also able to change the direction of the nanowire in the middle of growth, with resulted in a bent shape. Furthermore, the group they  reported that the growth resulted in defect-free nanowires up to diameters of 200 nm, which are much larger than previously reported diameters of 20-60 nm. \cite{Kuykendall_2014} Growth alignment has also been controled controlled  through the structure of the substrate itself; reports of sapphire, quartz, and spinel substrates with different crystallographic orientations resulted in the nanowires growing at specific angles. \cite{Goren_Ruck_2014} \cite{Tsivion_2014} \cite{Tessarek_2014} The shape of GaN nanowires has also been tuned by various syntheses, which had resulted in the creation of nanowires of serrated, helical, and branched formations. \cite{Li_2014} \cite{Suo_2015} Morphology control has been reported: for example, by controlling the presence of manganese, researchers were able to induce the formation of serrated nanowires. \cite{Patra_2014} However, even though the mechanisms behind these unique growth methods are not well understood, they have shown promise in unique applications for photochemistry and 3D nanostructures.