Simple Syntheses of CdSe Quantum Dots

Landry, Matthew L.; Morrell, Thomas E.; Karagounis, Theodora K; Hsia, Chih-Hao; Wang, Chia-Ying

doi:10.1021/ed300568e

Cited by 72 publications

(57 citation statements)

References 31 publications

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“…Thus, the demonstration of quantum phenomenon is not an easy task to be performed in a simple lab experiment. For instance, QDs seems to be a perfect material to allow students visualize absorption/emission of the light, as demonstrated by Landry (2014) [18]. However, it is still danger for students to deal with heavy metals like Cd.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Quantum Dots: A Safe Tool to Learn about Quantum Phenomenon in Nanomaterials

Cruz¹,

Freire²,

Carneiro³

et al. 2017

jlce

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In this paper, a lab experiment to demonstrate quantum phenomena was developed using carbon quantum dots (CQDs), a new carbon-based fluorescent nanomaterial, discovered in 2004. Therefore, a practical class was developed to demonstrate quantum phenomena using cheap and safe chemical products. Over 140 students from biotechnology, pharmacy, engineers and geology courses have successfully performed the proposed lab experiment. By following a short, easy and totally safe procedure, the students were able to synthesize CQDs, as well as to visualize the quantum phenomena related to the light scattering, absorption and emission. It was also possible to obtain the absorption spectrum of the CQD sample, with an absorption band at 325 nm. Additionally, a wavelength-dependent behavior was observed for the synthesized CQDs. This may be used to deeply study quantum confinement effects. Therefore, CQDs can be a powerful and versatile tool to learn about quantum phenomena in nanomaterials.

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Section: Discussionmentioning

confidence: 99%

“…Beyond CQDs, semiconductor nanocrystal quantum dots (QDs) such as CdSe can also be considered a powerful education tool [18]. Their size-dependent optical properties are perfect to allow students to visualize applications of quantum chemistry.…”

Section: Introductionmentioning

confidence: 99%

Carbon Quantum Dots: A Safe Tool to Learn about Quantum Phenomenon in Nanomaterials

Cruz¹,

Freire²,

Carneiro³

et al. 2017

jlce

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“…Sifat-sifat optik yang dimiliki oleh kuantum dot antara lain adalah luminesensi yang terang, puncak emisi cahaya yang sempit, dan rentang panjang gelombang eksitasi yang lebar. Material semikonduktor berorde nanometer ini banyak diaplikasikan sebagai sensor optik untuk keperluan imaging, target labeling, sensor temperatur, bahkan sensitizer untuk sel surya [1].…”

Section: Pendahuluanunclassified

Analisis Pengaruh Penambahan Nanopartikel Emas Terhadap Intensitas Emisi Dan Waktu Peluruhan Fotoluminesensi Kuantum Dot Cdse 618

Pattersons

Isnaeni

2018

SPEKTRA

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AbstrakTelah dilakukan pencampuran nanopartikel emas dengan kuantum dot CdSe 618. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penambahan nanopartikel emas terhadap intensitas emisi dan waktu peluruhan fotoluminesensi kuantum dot CdSe 618. Dalam 2 mL kuantum dot CdSe 618, ditambahkan nanopartikel emas sebanyak 40 µL, 80 µL, dan 120 µL. Pada setiap penambahan tersebut, dilakukan pengujian fotoluminesensi dan time-resolved photoluminescence, masing-masing untuk mengetahui intensitas emisi dan waktu peluruhan fotoluminesensi kuantum dot CdSe 618 setelah ditambahkan dengan nanopartikel emas. Dilakukan pula pengukuran terhadap rentang panjang gelombang absorpsi dari nanopartikel emas, beserta ukuran diameter partikel-partikelnya. Hasil pengujian menunjukkan bahwa secara keseluruhan, intensitas emisi kuantum dot CdSe 618 setelah ditambahkan dengan nanopartikel emas menjadi lebih rendah, dan nilai waktu peluruhan fotoluminesensi menjadi lebih besar. Penurunan intensitas emisi dan peningkatan waktu peluruhan fotoluminesensi diakibatkan oleh kemunculan plasmon pada nanopartikel emas. Kata-kata kunci: nanopartikel emas, kuantum dot, fotoluminesensi. AbstractWe have done the mixing of gold nanoparticles and CdSe 618 quantum dots. The purpose of this study is to see the influence of gold nanoparticles increment to emission intensity and photoluminescence decay time of CdSe 618 quantum dots. Into 2 mL of CdSe 618 quantum dots, we added gold nanoparticles as much as 40 µL, 80 µL, and 120 µL. At each adding, we did photoluminescence and time-resolved photoluminescence testings, to see emission intensity and photoluminescence time decay of CdSe 618 quantum dots after the adding of gold nanoparticles. We also did a measurement of absorption wavelength range of gold nanoparticles, along with diameter size of the particles. The results showed that, overall, the emission intensity of CdSe 618 quantum dots became lower after the adding of gold nanoparticles, and the value of photoluminescence decay time became bigger. The decrease of emission intensity and the increment of photoluminescence decay time were caused by the appearance of a plasmon at gold nanoparticles.

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“…They can be used in LEDs, photovoltaics, biological imaging, thermoelectric devices or single-electron transistors [1][2][3][4][5][6][7][8][9][10][11]. In terms of selenium-containing semiconductor nanoparticles a wide variety of starting materials is known [1,[12][13][14]. In the literature metal selenide nanoparticles are mostly prepared by a dual-source approach from the reaction of different metal salts like MSO 4 or M(OAc) 2 and Na 2 SeO 3 [1,15].…”

Section: Introductionmentioning

confidence: 99%

“…In terms of selenium-containing semiconductor nanoparticles a wide variety of starting materials is known [1,[12][13][14]. In the literature metal selenide nanoparticles are mostly prepared by a dual-source approach from the reaction of different metal salts like MSO 4 or M(OAc) 2 and Na 2 SeO 3 [1,15]. The metal complexes of aminoalkylselenoles like selenocysteamine for example have proven to be excellent single-source precursors for the preparation of metal selenide nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Bis((dialkylamino)alkylselenolato)metal complexes as precursors for microwave-assisted synthesis of semiconductor metal selenide nanoparticles of zinc and cadmium in the ionic liquid [BMIm][ BF4]

Klauke

Hahn

Schütte

et al. 2015

Nano-Structures & Nano-Objects

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Simple Syntheses of CdSe Quantum Dots

Cited by 72 publications

References 31 publications

Carbon Quantum Dots: A Safe Tool to Learn about Quantum Phenomenon in Nanomaterials

Carbon Quantum Dots: A Safe Tool to Learn about Quantum Phenomenon in Nanomaterials

Analisis Pengaruh Penambahan Nanopartikel Emas Terhadap Intensitas Emisi Dan Waktu Peluruhan Fotoluminesensi Kuantum Dot Cdse 618

Bis((dialkylamino)alkylselenolato)metal complexes as precursors for microwave-assisted synthesis of semiconductor metal selenide nanoparticles of zinc and cadmium in the ionic liquid [BMIm][ BF4]

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