(Invited) Defect Engineering in Plasma-Treated Graphene Films

晶界 材料科学 石墨烯 等离子体 拉曼光谱 化学物理 离子 空位缺陷 纳米技术 原子物理学 微观结构 化学 复合材料 结晶学 光学 量子力学 物理 有机化学
作者
Luc Stafford
出处
期刊:Meeting abstracts 卷期号:MA2021-01 (12): 602-602
标识
DOI:10.1149/ma2021-0112602mtgabs
摘要

Engineering of defects located in-grain or at grain boundary is central to the development of functional materials and nanomaterials. While there is a recent surge of interest in the formation, migration, and annihilation of defects during ion and plasma irradiation of bulk (3D) materials, the detailed behavior in low-dimensional materials remains most unexplored and especially difficult to assess experimentally. A new hyperspectral Raman imaging scheme providing high selectivity and diffraction-limited spatial resolution is here adapted to examine plasma-induced damage in a polycrystalline graphene film grown by chemical vapor deposition on copper substrates and then transferred on silicon substrates. For experiments realized in nominally pure argon plasmas at low pressure, spatially resolved Raman conducted before and after each plasma treatment shows that the defect generation in graphene films exposed to very low-energy (11 eV) ion bombardment follows a 0D defect curve, while the domain boundaries tend to develop as 1D defects. Surprisingly and contrary to common expectations of plasma-surface interactions, damage generation at grain boundaries is slower than within the grains. Inspired by recent modeling studies, this behavior can be ascribed to a lattice reconstruction mechanism occurring preferentially at domain boundaries and induced by preferential atom migration and adatom-vacancy recombination. Further studies were realized to compare the impact of different plasma environments promoting either positive argon ions, metastable argon species, or VUV-photons on the damage formation dynamics. While most of the defect formation is due to knock-on collisions by 11-eV argon ions, the combination with VUV-photon or metastable atom irradiation is found to have a very different impact. In the former, the photons are mainly thought to clean the films from PMMA residues due to graphene transfer from copper to silicon substrates. On the other hand, in conditions with both ion and metastable atom irradiation, the surface de-excitation of the latter seem to greatly enhance the self-healing of the grain boundaries due to an increase of the local energy deposition. Finally, these experiments were used as building blocks to examine the formation of chemically doped graphene film in such plasmas using argon mixed with either traces of N- or B-bearing gases. While preferential n-type doping was observed in graphene domains in nitrogen-containing plasmas, preferential p-type doping was observed at grain boundaries in boron-containing plasmas.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
独特乘风完成签到,获得积分10
2秒前
含糊的代丝完成签到 ,获得积分10
5秒前
朴素的紫安完成签到 ,获得积分10
6秒前
yyj完成签到,获得积分10
7秒前
8秒前
8秒前
量子星尘发布了新的文献求助10
8秒前
君临完成签到,获得积分10
8秒前
林早上完成签到,获得积分20
8秒前
xiu完成签到 ,获得积分10
9秒前
栗爷完成签到,获得积分0
9秒前
深年完成签到,获得积分10
10秒前
求知若渴完成签到,获得积分0
10秒前
所所应助科研通管家采纳,获得10
10秒前
情怀应助科研通管家采纳,获得10
10秒前
华仔应助科研通管家采纳,获得30
10秒前
李爱国应助科研通管家采纳,获得10
11秒前
Orange应助科研通管家采纳,获得10
11秒前
我是老大应助科研通管家采纳,获得10
11秒前
华仔应助科研通管家采纳,获得10
11秒前
SciGPT应助科研通管家采纳,获得10
11秒前
11秒前
一团小煤球完成签到,获得积分10
11秒前
11秒前
NexusExplorer应助科研通管家采纳,获得10
11秒前
11秒前
11秒前
卡乐瑞咩吹可完成签到,获得积分10
11秒前
田様应助科研通管家采纳,获得10
11秒前
苦咖啡行僧完成签到 ,获得积分10
11秒前
鹤鸣完成签到,获得积分10
12秒前
守望阳光1完成签到,获得积分10
12秒前
正直天空发布了新的文献求助10
12秒前
14秒前
YU发布了新的文献求助10
14秒前
大方元风完成签到 ,获得积分10
14秒前
隐形曼青应助自觉寒梦采纳,获得10
15秒前
ntxlks完成签到,获得积分10
15秒前
祝雲完成签到,获得积分10
15秒前
Spice完成签到 ,获得积分10
16秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038388
求助须知:如何正确求助?哪些是违规求助? 3576106
关于积分的说明 11374447
捐赠科研通 3305798
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029