Silver loaded graphene as a substrate for sensing 2-thiouracil using surface-enhanced Raman scattering

Saleh, Tawfik A.; Al-Shalalfeh, Mutasem M.; Al‐Saadi, Abdulaziz A.

doi:10.1016/j.snb.2017.07.179

Cited by 105 publications

(19 citation statements)

References 39 publications

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“…As shown in Figure c, the XPS spectrums of Fe 3 O 4 /GO displayed that the CC, CO, and CO valence bonds were observed from the narrow scan of C 1s, manifested that the GO was successfully anchored on the surface of Fe 3 O 4 . Figure d showed the XPS spectrum of Ag 3d doublet (3d 5/2 and 3d 3/2 ) for FGA composites and the peaks of 3d 5/2 and 3d 3/2 at 368.3 and 374.3 eV, respectively . Besides, compared Figure e with Figure c, a new C‐N peak could be found from the spectrum of FGA‐MIP composites, which attributed to the bond of CN of the functional monomer .…”

Section: Resultsmentioning

confidence: 85%

Preparation of a high‐performance magnetic molecularly imprinted sensor for SERS detection of cyfluthrin in river

Wang

et al. 2019

J Raman Spectroscopy

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A novel magnetic molecularly imprinted sensor (Fe 3 O 4 /GO/Ag-MIPs) was successfully synthesized. Combining with the technique of surface-enhanced Raman scattering (SERS), it could be applied to detect cyfluthrin (LC). Herein, GO and Ag particles were anchored on the surface of the Fe 3 O 4 @SiO 2 to obtain the composite (Fe 3 O 4 /GO/Ag), which was prepared as a SERS substrate. Then, the Fe 3 O 4 /GO/Ag-MIPs (FGA-MIPs) prepared by precipitation polymerization was evaluated as the SERS imprinted sensor for selective detection of LC from aqueous medium. The morphology and structural properties of FGA-MIPs were characterized by a series of modern analysis measurements. The results proved that FGA-MIPs possessed wonderful magnetic separation, sensitive SERS detection, and selectivity. Under optimal conditions, it exhibited a good linear relationship (R 2 = 0.9926) between the Raman shift (at 1,004 cm −1 ) and the concentration of LC among 10 −3 -10 −8 mol/L, and the limit of detection was 10 −8 mol/L. Meanwhile, the selective experiment indicated that this material owned specific selectivity to the template molecules. Thus, the result of this experiment demonstrated that the FGA-MIPs was a highly sensitive and selective sensor material in the field of LC detection, and it provided a new approach to other residual pyrethroid detection in the environment water.

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Section: Resultsmentioning

confidence: 85%

Preparation of a high‐performance magnetic molecularly imprinted sensor for SERS detection of cyfluthrin in river

Wang

et al. 2019

J Raman Spectroscopy

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“…g-C 3 N 4 /Ag 纳米复合材料与 Ag 纳米粒子的差谱图可以看到 428 nm 到 700 nm 范围内有很强的吸收. RhB 的最大吸收峰在 552 nm 左右, 与所使用拉曼仪器的激发波长 532 nm 相匹配, 产生表面共振增强拉曼效应 [24,25] , 并与 g-C 3 N 4 /Ag 纳米复合材料产生的 SPR 两者共同作用下, 产生了极大的 SERS 增强信号. 图 2b 中 RhB 主要的拉曼峰归属如下.…”

Section: 引言unclassified

Trace Detection of Rhodamine B in Infant Candy by g-C₃N₄/Ag Nanocomposite as Surface-Enhanced Raman Scattering Substrate

Ma¹,

Wu²,

Zhu³

et al. 2019

Acta Chim. Sinica

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摘要近年来, 由婴幼儿食品中存在非法添加剂所引起的食品安全问题已经受到了广泛的关注. 表面增强拉曼散射 (SERS)技术可以对食品中被禁止添加的常用染料分子罗丹明 B (RhB)进行快速无损超灵敏的检测. 通过在类石墨相氮化碳(g-C 3 N 4)纳米片上组装 Ag 纳米粒子的方式构筑了 g-C 3 N 4 /Ag 复合材料, 并采用透射电子显微镜(TEM)、紫外可见近红外分光光度计(UV-Vis)、X 射线衍射仪(XRD)、荧光光谱仪和共聚焦显微拉曼光谱仪(Raman)对复合材料的形貌和结构进行了表征. g-C 3 N 4 纳米片不仅具有高度的离域 π 共轭体系和良好的吸附染料分子的性能, 而且可以作为 Ag 纳米粒子的载体, 使 Ag 纳米粒子均匀稳定地分散在其表面. 通过控制实验条件, 优化了测试过程中的 pH 及基底与 RhB 的结合时间, 详细探究 pH 对基底表面等离子共振的影响和对探针分子 SERS 强度的影响.

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“…Bunun yanında yüksek antitiroid aktivitesi nedeniyle hipertiroidizm tedavisinde kullanılır. Ayrıca melanom için spesifik bir tümör belirtecidir [3][4][5]. Bu nedenle, 2-TU'yu belirlemek için hızlı ve duyarlı bir yöntemin geliştirilmesi farmakokinetik ve klinik çalışmalar için oldukça önemlidir.…”

Section: Introductionunclassified

“…Bu nedenle, 2-TU'yu belirlemek için hızlı ve duyarlı bir yöntemin geliştirilmesi farmakokinetik ve klinik çalışmalar için oldukça önemlidir. Diğer urasil türevleri gibi 2-TU'nun tayini için de spektrofotometrik, kemilüminesans, kütle spektrometri, yüzeyde güçlendirilmiş Raman spektroskopisi ve elektrokimyasal analiz gibi yöntemler kullanılmaktadır [5][6][7][8][9][10][11]. Elektrokimyasal yöntemler, farklı potansiyellerde voltametrik cevap gösteren analit türlerinin araştırılmasında kullanılan yararlı yöntemlerdir.…”

Section: Introductionunclassified

Development of Electrochemical DNA Sensor Based on Poly (Bromocresol purple) Modified Glassy Carbon Electrode for the Determination of 2-Thiouracil

Zeybek

Doğanci

Karaşalli

2020

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, potansiyel bir kanser ilacı olan 2-tiyourasil (2-TU) ilacı ile balık sperminden elde edilen çift zincirli deoksiribonükleik asit (dsDNA) molekülü arasındaki etkileşim incelenmiş ve bu etkileşime dayalı olarak ilacın elektrokimyasal tayini gerçekleştirilmiştir. Bunun için, camsı karbon elektrot (GCE) yüzeyi, bromokrezol moru (BCP) monomerinin elektrokimyasal polimerizasyonu ile modifiye edilmiş ve bu elektrot (GCE/P(BCP)) yüzeyine, dsDNA elektrokimyasal olarak immobilize edilmiştir (GCE/P(BCP)/dsDNA). dsDNA ile 2-TU arasındaki etkileşim mekanizması diferansiyel puls voltametri yöntemiyle araştırılmıştır. Bu etkileşim sonrası guaninin yükseltgenme pik akımında azalma gözlenmiş ve bu azalmaya bağlı olarak 2-TU'in elektrokimyasal tayini indirekt yöntemle gerçekleştirilmiştir. 2-TU için doğrusal çalışma aralığı 0,1-50 mg L −1 ve gözlenebilme sınırı 0,033 mg L −1 olarak bulunmuştur. 2-TU−dsDNA etkileşim mekanizması UV-Görünür bölge moleküler absorpsiyon spektroskopi yöntemiyle de incelenmiştir. Hazırlanan DNA biyosensörüne bozucu etki yapabilecek türlerin etkisi araştırılmış ve ayrıca 2-TU ilacının idrar numunesinde tayini gerçekleştirilmiştir. Deneysel çalışmalardan elde edilen sonuçlara göre, 2-TU ve dsDNA arasındaki başlıca etkileşim modunun interkalasyon olduğu belirlenmiştir.

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Silver loaded graphene as a substrate for sensing 2-thiouracil using surface-enhanced Raman scattering

Cited by 105 publications

References 39 publications

Preparation of a high‐performance magnetic molecularly imprinted sensor for SERS detection of cyfluthrin in river

Preparation of a high‐performance magnetic molecularly imprinted sensor for SERS detection of cyfluthrin in river

Trace Detection of Rhodamine B in Infant Candy by g-C₃N₄/Ag Nanocomposite as Surface-Enhanced Raman Scattering Substrate

Development of Electrochemical DNA Sensor Based on Poly (Bromocresol purple) Modified Glassy Carbon Electrode for the Determination of 2-Thiouracil

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Silver loaded graphene as a substrate for sensing 2-thiouracil using surface-enhanced Raman scattering

Cited by 105 publications

References 39 publications

Preparation of a high‐performance magnetic molecularly imprinted sensor for SERS detection of cyfluthrin in river

Preparation of a high‐performance magnetic molecularly imprinted sensor for SERS detection of cyfluthrin in river

Trace Detection of Rhodamine B in Infant Candy by g-C3N4/Ag Nanocomposite as Surface-Enhanced Raman Scattering Substrate

Development of Electrochemical DNA Sensor Based on Poly (Bromocresol purple) Modified Glassy Carbon Electrode for the Determination of 2-Thiouracil

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Product

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Trace Detection of Rhodamine B in Infant Candy by g-C₃N₄/Ag Nanocomposite as Surface-Enhanced Raman Scattering Substrate